Find some malt \"Exercise in High Alchemy\" (The Witcher 3: Wild Hunt)

go up the stairs, near the left large vat

I couldn't find it either! then he drank a cat, climb the stairs next to the barrels where to cook it and there it will be lying around !!!! I hope it helped!

Slayerz85
SuperEnot
from the heart of the guys, I'll check