A beer flavored with bull testicles started out as an April Fool's joke for a Denver, Colorado, brewery and restaurant, but thanks to the popularity of the prank, the Wynkoop Brewing Company has officially announced it will be selling its Rocky Mountain Oyster Stout -- in two packs, naturally, spokesman Marty Jonestells ABC News Radio -- by the end of the month.

Apparently, the Federal Alcohol and Tobacco Tax and Trade Bureau needed to be convinced the essence of testicles shouldn't be dropped from the brew, despite the fact that bull testicles -- sometimes referred to as Rocky Mountain Oysters -- are a regional delicacy.

For the record, the company says the brew -- which will be sold to beer lovers everywhere through the site beerjobber.com -- is, "a luscious, uniquely ballsy stout with notes of roasted barley, coffee and nuts."