Where does butter come from?

<a href="http://webexhibits.org/butter/" title="Butter : Explore the history &amp; making of butter">Butter : Explore the history &amp; making of butter</a>: &ldquo;Butter is a culinary treasure as old as King Tut&rsquo;s tomb. &lsquo;She brought forth butter in a lordly dish&rsquo; (Judges 5:25). A jug of wine, a loaf of bread &mdash; and butter! Pure butter is produced today essentially as it was in King Tut&rsquo;s time, though butter made of milk from cows instead of camels or water buffaloes.&rdquo;