What is Daggamalt?

Old Photo: it's now nerfed to 405 and 68/s.

Taking a mild break from making simple walkthroughs, I thought it'd be fun to look at one of the health potions we all use without thinking.

What is Daggamalt?  We know it to be the level 60 healing potion that everyone knows, loves, and wishes was more potent (which then begot us Potent Daggamalt).  The beer nerd and amateur home brewer in me wanted to look into whether it would be possible to make Daggamalt.