Medieval Butter Beer

http://12bottlebar.com/2010/12/buttered-beere/

Have you ever been drinking beer on a cold winter day and wished to yourself "I really wish this cold beer was hot...and had a stick of butter in it?"  If so, this recipe is for you.  Sounds a lot like a custard or an eggnog of sorts.  I'm sure I'll whip some up in the depths of winter and report back.