[mbalbritton]

Brewed stout that we added cocoa powder and cherry concentrate to. The end result was a bit sharp/tart. Is there anything at this point that I can add to my already kegged and carbonated beer to smooth it out?

[erockrph]

Try some bicarbonate. That may neutralize some of that acidity. Try a small amount in a glass first. If it works, then work out how much is needed for a full keg.