Stone Age IPA

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I based this recipe on the Stone IPA clone in the December, 2008 Issue of Brew Your Own Magazine. The differences are mostly from ingredient substitutions and process differences.

As Jamil and John do in Brewing Classic Styles, I formulated this recipe to produce five gallons (19 L) of beer for packaging. I assume a loss due to trub of a half-gallon in the fermenter and another half-gallon in the boil kettle. That will leave six gallons (22.7 L) at the end of the boil. I assume a boil-off rate of about one gallon per hour, which means I need 7.5 gallons (28.4 L) at the start of the boil for a 90-minute full-volume boil. I use bagged pellet hops for all hop additions.

Recipe: Stone Age IPA

Brewhouse Efficiency: 70%
Pre-Boil Volume: 7.5 gallons (28.4 L)
BG: 1.050 (12.39 °P)
OG: 1.063 (15.44 °P)
FG: 1.019 (4.83 °P)
ADF: 69%
IBU (Rager): 60
ABV: 5.9%
Color (Morey): 4.7 SRM (9.3 EBC) – Gold
Boil: 90 minutes

Grains Weight Percent
Rahr 2-Row Malt (1.7 °L) 12.75 lb. (5.78 kg) 93.6
Briess Caramel (10 °L) 14 oz. (397 g) 6.4
 
Hops IBU
Perle 7.8% AA, 90 min. 0.56 oz (16 g) 17.4
Magnum 14.4% AA, 90 min. 0.42 oz (12 g) 24.1
Centennial 9.2% AA, 15 min. 2.0 oz (57 g) 18.9
Centennial 9.2% AA, dry 1.0 oz (28 g) 0
Chinook 11.4% AA, dry 0.5 oz (14 g) 0
 
Yeast
Wyeast 1968 London ESB

Step by Step

This is a single step infusion mash at 1.56 qt./lb. with a batch sparge. Mix the crushed grain with 5.3 gallons (20 L) of 160 °F (71 °C) water to stabilize at 152 °F (67 °C) for 60 minutes. Vorlauf and lauter to collect 3.75 gallons (14.2 L) of wort.

Sparge with 3.75 gallons (14.2 L) of 170 °F (77 °C) water to bring the collected volume to about 7.5 gallons (28.4 L). Boil for 90 minutes. While boiling, add the hops as per the hopping schedule. Cool the wort to 68 °F (20 °C). Transfer to a sanitized 6.5 gallon (24.6 L) glass carboy fermenter.

Pitch yeast and aerate the wort. Hold at 66 °F (19 °C) until fermentation is complete. Add dry hops. Let the beer condition for one week and then bottle. Carbonate to 2.0 volumes using 3.0 ounces (85 g) corn sugar. Bottle condition for two more weeks. Enjoy your Stone Age IPA.

(17) Sunday, April 11, 2010 Brew Day

It’s another great day to brew. Today (4/11) I’m doing the BYO Stone IPA clone.

9:38 Finished mash/lauter/sparge calculations.

9:42 Yeast smacked.

10:30 Brewery set up. Heating strike water. Weighing grains.

10:49 Grains crushed.

10:56 Filling MLT with 160 °F strike water.

10:59 Mashing at 152 °F.

Note: Beiss Caramel 10L is very hard (crunchy) with a grainy flavor and very slight sweetness. Rahr 2-row has a much earthier flavor and is not as hard.

11:36 There’s a mocking bird running through her repertoire in a nearby oak tree. Sunny skies with a temperature of 61 °F.

11:44 Heating sparge water.

12:00 Vorlauff.

12:05 First runnings 19 Brix/1.076 SG.

Note: First runnings are DELICIOUS! Very sweet. Nice light color. The yeasties should be very happy.

12:10 Adding sparge water

12:15 Vorlauff.

12:18 Sparging. Gravity of second runnings 9 Brix/1.035 SG.

Note: Second runnings not as sweet as first. Subtle earthy flavor.

12:22 Combined wort 12.4 Brix/1.049 SG (BG). Expected 1.050. Sight glass says about 7⅜ gallons, but the kettle is leaning back a bit because the ground under the camp stove is uneven so I’m going to call it 7½ gallons, which was the target.

Note: About the level of sweetness of hot cocao.

12:26 Heating to boil.

12:34 Dumped spent grain on compost pile.

12:54 Measured out boil hops.

Note: Drinking a Stone IPA while brewing a Stone IPA clone. How fitting. Thank you, Gretchen, for thinking of it and joining me.

1:02 Boiling. I can see the hot break this time. It does look like egg drop soup. I still have no idea why I could not see it last time. Adding bittering hops.

2:14 Placed chiller in kettle to sanitize.

2:19 Adding flavor/aroma hops and whirlfloc tablet.

2:28 Sanitize fermenter.

2:34 Flame out. Chilling.

2:56 Chilled to 68 °F. Removing chiller, whirlpooling, and cover.

3:06 15.2 Brix/1.060 SG (OG). Expected 1.063 (1.065).

3:12 Draining to fermenter.

3:38 Aerating.

3:41 Pitched. Fermenting at 66 °F.

4:25 Everything put away.

Update: It is Monday (4/12) and when I went to see how my beer was doing, I noticed the thermostat for the fermentation chamber heater was on. It was set for 66 °F, but it was reading 60°F, so I investigated further. Turns out I did remember to put the temperature probe into the thermowell in the carboy, but I forgot to wrap the fermwrap heater around it. It was desperately trying to heat the carboy, but it did not have much of a chance since it was a few feet away. Easy enough to fix, but my streak of messing something up every batch is still unbroken. They say that colder fermentation can be cleaner, so I do not think this will be a problem.

Update: It is the next Monday (4/19) and I just added the dry hops.

Update: It is the next Sunday (4/25) and I’m bottling. The gravity measures 7.6 Brix/1.011 FG. Expected 1.019. Wow. 80.9% ADF. 6.5% ABV. I have to assume that my mash lost temperature (or my thermometer reads high) and my wort was much more fermentable than I expected. The beer had been fermenting at 64 °F. I got 51½ bottles (618 oz or 4.8 gallons). I used 3 oz of corn sugar. I should end up with about 2.2 volumes of CO₂.

Commemoration Ale

I based this recipe on Mike “Tasty” McDole’s award-winning American IPA (a Sierra Nevada Celebration Ale clone).

As Jamil and John do in Brewing Classic Styles, I formulated this recipe to produce five gallons (19 L) of beer for packaging. I assume a loss due to trub of a half-gallon in the fermenter and another half-gallon in the boil kettle. That will leave six gallons (22.7 L) at the end of the boil. I assume a boil-off rate of about one gallon per hour, which means I need 7.5 gallons (28.4 L) at the start of the boil for a 90-minute full-volume boil. I use bagged pellet hops for all hop additions.

Recipe: Brush Valley Brewing Commemoration Ale

Brewhouse Efficiency: 70%
Pre-Boil Volume: 7.5 gallons (28.4 L)
BG: 1.054 (13.33 °P)
OG: 1.068 (16.59 °P)
FG: 1.016 (4.08 °P)
ADF: 75%
IBU (Rager): 84
ABV: 6.9%
Color (Morey): 13.7 SRM (35.2 EBC) – Light Copper
Boil: 90 minutes

Grains Weight Percent
Rahr 2-Row Malt (1.7 °L) 13.0 lb. (5.9 kg) 81.3
Briess Carapils (1.5 °L) 1.0 lb. (0.45 kg) 6.3
Briess Caramel (60 °L) 1.0 lb. (0.45 kg) 6.3
Briess Caramel (120 °L) 0.5 lb. (0.227 g) 3.1
German Munich Malt (8.3 °L) 0.5 lb. (0.227 g) 3.1
 
Hops IBU
Chinook 11.4% AA, 60 min. 1.0 oz (28 g) 42.9
Centennial 9.9% AA, 15 min. 2.0 oz (57 g) 19.9
Cascade 7.8% AA, 5 min. 2.0 oz (57 g) 10.9
Cascade 7.8% AA, 1 min. 2.0 oz (57 g) 9.9
Cascade 7.8% AA, dry 1.0 oz (28 g) 0
Centennial 9.2% AA, dry 1.0 oz (28 g) 0
Chinook 11.4% AA, dry 1.0 oz (28 g) 0
 
Yeast
Wyeast 1056 American Ale

Step by Step

This is a single step infusion mash at 1.375 qt./lb. with a batch sparge. Preheat the mash tun. Mix the crushed grain with 5.5 gallons (21 L) of 164 °F (73 °C) water to stabilize at 151 °F (66 °C) for 60 minutes. Vorlauf and lauter to collect 3.75 gallons (14.2 L) of wort.

Sparge with 3.75 gallons (14.2 L) of 170 °F (77 °C) water to bring the collected volume to approximately 7.5 gallons (28.4 L). Boil for 90 minutes. While boiling, add the hops as per the hopping schedule. Cool the wort to 68 °F (20 °C). Transfer to a sanitized 6.5 gallon (24.6 L) glass carboy fermenter.

Pitch yeast and aerate the wort. Hold at 68 °F (20 °C) until fermentation is complete. Add dry hops. Let the beer condition for one week and then bottle. Carbonate to 2.0 volumes using 3.0 ounces (85 g) corn sugar. Bottle condition for an two additional weeks. Enjoy your Commemoration Ale.

(16) Vernal Equinox 2010 Brew Day

Going to brew commemoration ale today (3/21)…

Ground the grains last night (3/20).

10:04 Strike water is hot. Started targeting 5½ gallons. Forgot to close valve on kettle. Guessed a quart lost. Added more. Ended up reading 6 gallons on sight glass.

10:08 Mashing. Mash temperature 158 °F. Added ½ g. 67 °F (tap) water. Settled at 152 °F. Mash volume just under 8 gallons.

10:48 Heating sparge water.

11:08 Vorlauf twice. ½-gallon Each. Temp 147 °F.

11:13 Lautering. Gravity of first runnings is 18.3 Brix. 1.073 SG.

11:18 First runnings collected. Sight glass says 4½ gallons.

11:24 Added sparge water. About 3¼ gallons.

11:34 Sparging. Starting with two ½-gallon vorlauf. Then collecting 3 gallons.

11:43 Sparge complete. Gravity of second runnings is 7.4 Brix. 1.029 SG. Total collected volume 7¼ gallons by sight glass. Boil gravity 13.7 Brix. 1.054 SG. Nailed it!!!

11:45 Heating to boil.

12:23 209 °F but rolling. I’m calling it a boil. Starting 90 min timer.

12:27 Boil over. Just barely. Don’t think it will effect anything.

12:36 Dumped spent grain on compost pile and rinsed MLT.

12:56 Bittering hops added.

1:41 Flavor hops added. Put immersion chiller in kettle to sanitize.

1:51 First aroma hop added.

1:55 Second aroma hop added.

1:56 Cooling.

2:20 Chilled. Original gravity 17 Brix. 1.068. Nailed it!!! Final volume 5⅓ gallons by sight glass. Draining to fermenter.

2:45 Aerating.

2:50 Pitching.

3:00 In fermentation chamber at 68 °F.

4:08 Everything cleaned and put away.

Next morning (3/22) I remembered to put sanitizer in the air lock. There is activity but it’s pretty weak.

So. Now that I have a chance to think I realize that I didn’t do some things. Nothing tragic, but if I’m taking notes i should have.

I tasted the grains as I was grinding them but I didn’t write my observations down. I remember the two-row was delicious and the dark kilned caramel was not but nothing in between and I have no record of my observations.

The other thing I didn’t do was taste the wort. Every time I took a gravity reading I should have tastes the wort. First and second runnings. Pre- and post boil. It might be interesting to taste the mash. It would also be good to taste the beer before carbonation.

Tuesday evening (3/23) I noticed that the beer temperature was 72 °F. The ambient temperature had warmed up during the day and wasn’t providing enough cooling capability. Fortunately the forecast for the evening was to be quite cold. I cracked a window and opened the panels on the fermentation box. After a few hours the temperature was down to 69 °F and was 66 °F by morning (that’s actually a bit low for what I had in mind).

There was also an issue with the Wyeast smack pack. It was partially inflated and I couldn’t get enough pressure on the nutrient pack to break it. When I pitched, a lot of the yeast appeared to be stuck in the package. I managed to break the nutrient pack once the smack pack was open, thinking that I could use it to rinse the yeast out of the outer pack with it. However, I managed to spray it all over the ceiling while breaking it open. So I think this batch is pretty severely underpitched. That and the temperature may result in a fairly strained yeast culture which may affect the beer flavor.

The following Saturday (3/27) I swirled the carboy and started raising the temperature targeting 70 °F for a diacetyl rest.

The following Monday (3/29) I added the dry hops. Gravity read 8.4 Brix (uncorrected) or 1.012 final gravity. Predicted final gravity was 1.016, so I’m guessing my wort was a little more fermentable than expected. That will give me an ABV of 7.5% when I expected 6.9%.

That coming Thursday (4/1) and Friday (4/2), the hops had begun to sink and settle to the bottom of the carboy. I swirled the beer in the carboy to re-suspend some of it and get as much out of them as I could.

Saturday (4/3) I bottled. I went with 2.2 volumes of CO₂. The beer finished fermenting at 70 °F. My calculations showed that I needed 0.84 ounces per gallon. I estimated that I had five gallons in the carboy, so that made 4.2 ounces total. I used 2 cups of water. I ended up with 12, 22-ounce bottles and 24, 12-ounce bottles (552 ounces, or 4.3125 gallons). That gave me 0.97 ounces per gallon, which should result in something under 2.7 volumes of CO₂, which is pretty high.

Here it is, the Tuesday after bottling (4/6). I had noticed the beer did not clear very well. I figured there was a lot of suspended yeast that would settle in bottle conditioning. I wondered if it was the amount of dry hops I had added leaving a haze of resins. Then today I was walking across campus while listening to a brewing podcast. They started talking about clarifiers. Then I remembered. I did not use one. I had not added it to my recipe and come brew day I forgot. I would normally use Irish moss or Whirlfloc. I do not know why I missed it this time. It will still be beer though.

It’s Wednesday (4/7). I found some leftover grains from the brew. I don’t have everything, but it’s worth tasting and recording what I do have.

The two-row is terrific. I would eat this as a snack or with breakfast. I had some trepidation when I first tasted my brewing grains. My wife rolls her own (our) oatmeal and every once in a while an oat sneaks through that still has the hull intact. Let me tell you, those things are inedible. GET THIS THING OUT OF MY MOUTH. NOW! For some reason, malted grains are not like that. I’ll gladly eat their husks. Anyway, I digress. The two-row is lightly flavorful. Unsurprisingly a bit like the insides of malted milk balls. The Munich malt has a very similar flavor, but ever-so-slightly sweeter. The Caramel 120L has a slightly burnt taste to it. Like the un-popped popcorn hulls in the bottom of the bowl that you eat anyway.

I mentioned that I hadn’t added any clarifier. The other thing I noticed, or rather that I had not noticed, that I had expected to notice was hot break and cold break. I have heard that one of the differences between extract and all grain is the presence of hot break and cold break. I have heard it described as being like egg drop soup. Well, I did not notice any of that. It seemed much like the extract brews I have made.

links for 2010-01-01

  • This section is intended to give an overview of the more important flavors and flaws that may be encountered while judging. Some of these flavors may be appropriate in some styles, but not in others, and the desirability will depend on the concentration. For this reason, not all of these characteristics are considered to be off-flavors. There are several references that offer a more detailed description of potential flavor and appearance flaws in beer. Most homebrewing handbooks discuss them in appendices, and although it is somewhat outdated, the 1987 Zymurgy Special Issue on Troubleshooting is worth reading. The more technically inclined reader should consult George Fix's Principles of Brewing Science and George and Laurie Fixs' Analysis of Brewing Techniques. Finally, Brewing Techniques is running a Focus on Flavors column through 1998 that describes the flavors that appear on the Beer Flavor Wheel.
    (tags: flavors)
  • There are probably dozens of ways to do this but the following will give you a color that is very close to a real beer color – in fact it will give you something like the average color for a beer with a particular SRM based on the sample of about 65 beers I measured. Remember that SRM is a fair predictor of beer lightness/darkness but not a good predictor of beer color. I'll give the formulas and then in brackets, […], the values for a beer of SRM 10.
    (tags: color srm formula)
  • Build a Countertop Grain Malting Floor. by Lina Thorgrimsdottir von Wissen
    (tags: malting diy)
  • Video interview with Otto's owner talking about the history and operation of the brew pub.
    (tags: local brewpub)

Drew Avis’ Random Beer Name Generator

http://www.strangebrew.ca/beername.php: “Tired of working long hours to come up with original beer names? Wonder how clasics such as ‘Delerium Tremens’, ‘Fat Bastard’, and ‘Toad Spit Stout’ were named? Need something better than ‘Batch 54 Brown Ale’ to impress your friends and family? Look no further, the world’s greatest beer naming technology, once only available to Charlie Papazian, has been recently declassified and is now at your fingertips. ”

David Parker on Calculating Mash Water Volume

Calculating Mash Water Volume ::: Brew365: “The amount of water absorbed by the grain during the mash can vary from system to system due to crushing methods, stirring practices, etc. Ray Daniels provides a constant of roughly 0.2 gallons of water absorbed per pound of grain. Denny Conn, in his great article on Cheap and Easy Batch Sparging provides an estimate of 0.1 gallons of water absorbed per pound based on his brewing system. As you can see, these vary greatly and can make a big difference in the total water added. The best thing to do is for you to note the volume for your particular system over several brew sessions, and keep a table of pounds of grain to water absorbed for your system.”

John Palmer and Dan Sherman on Calculating Mash Volume

HOMEBREW Digest #1792 Thu 27 July 1995:

Date: 26 Jul 1995 07:32:18 U
From: “Palmer.John” <palmer at ssdgwy.mdc.com>
Subject: Scientific Mashing Breakthru!

Well, Not really.
But I did find out something that should be very helpful to many of you.

I have been asking a few eminent homebrewers how much grain can be mashed in afixed volume Cooler ex. a 5 gallon Gott. The answers have been helpful, but anecdotal, i.e. “I did X lbs for this batch”.

So, last night on the way home from work, I had a brainstorm. Why not mash 1 lb in 1 quart and see what the volume is?!

Well, I did. I carefully weighed 1 lb of Great Western 2 Row malt, crushed it in my Maltmill and added it to 1 quart of 120F water. I let this sit for about 5 minutes. Since I only have a 1 quart pyrex measuring cup, I poured 24 oz of mash into the measuring cup and discarded it. I then poured in the remainder and measured it. It came to about 18 oz.

It occured to me that because the first measurement was more fluid, and the second pretty stiff, I might be experiencing compaction, and not getting a good measurement. So, I measured out 2 more cups of hot water (16oz) and added it to the 2nd measure of mash in the quart measuring cup. If I had been paying better attention, I would have only added 1 cup. The liquid level rose to just over the 32 oz mark.

Comparing the two measurements, I determined that the addition of 16 oz of water to the 18oz looked to be a change in volume of 16 oz, meaning that I had negligible compaction.

So! We now have a brewing constant for figuring how much grain can be mashed in a fixed volume. 1 Pound of 2 Row Malt mixed with 1 Quart of Water produces a volume of 42 fluid ounces. If you are figuring a 1.5 quart per pound mash, then add in the additional half quart per pound as my measurements show that 1 quart per pound is already a saturated condition.

In summary, 10 lbs of Malt at 1.5 qt/lb would fill just over 4.5 gallons, which would be do-able in a 5 gallon cooler. This would yield a 1.060 beer.

John J. Palmer – Metallurgist for MDA-SSD M&P
johnj at primenet.com Huntington Beach, California
Palmer House Brewery and Smithy – www.primenet.com/~johnj/

HOMEBREW Digest #1793 Fri 28 July 1995:

Date: Thu, 27 Jul 1995 12:14:54 -0700 (PDT)
From: Dan Sherman <dsherman at sdcc3.ucsd.edu>
Subject: Re: Scientific Mashing Breakthru!

John Palmer <palmer at ssdgwy.mdc.com> wrote:

So! We now have a brewing constant for figuring how much grain can be mashed in a fixed volume. 1 Pound of 2 Row Malt mixed with 1 Quart of Water produces a volume of 42 fluid ounces.

And, since 1 quart of water is 32 fl. oz., we can conclude that 1 pound of 2 row malt displaces about 10 fl. oz.

So, assuming you use at least 1 qt/lb:

mash volume (in ounces) = (total quarts of water)*32 + (lbs of malt)*10
or
mash vol. (gallons) = (total quarts of water)*0.25 + (lbs of malt)*0.08

In summary, 10 lbs of Malt at 1.5 qt/lb would fill just over 4.5 gallons

mash vol. (gal.) = (15)*0.25 + (10)*.08 = 4.55 gal.

Thanks, John. Great job!!

Cheers!

Dan Sherman
San Diego, CA
dsherman at ucsd.edu

Dan Morey on Beer Color Estimation

Beer’s Law – Dan A. Morey: “It has been well documented that beer color is not a linear scale. So why try to relate Malt Color Units to an estimated SRM by a linear equation? I propose a power equation would better approximate the color phenomenon.

What I did was: Assume MCU = SRM from 0 to 10.5, Daniel’s equation holds in the range of 10.5 < MCU < 37, and Mosher's formula holds for MCU < 37. Then I plotted In (MCU) vs. In (SRM) and performed linear regression. This exercise resulted in a R^2 value of 0.97 (This is better than my linear fit with force zero intercept on the MCU vs. SRM graph – R^2 0.96). My resulting equation is:

SRM = 1.4922 [(MCU) ^ 0.6859] – for values of SRM < 50

Now there is a single equation that can be used to estimate the final color of beer.”