To ferment Mead Base Recipes you need Fermentor, Cauldron & Honey.
Fermentor is used to prepare Mead Base Recipies. Fermentor is locker after defeating the first boss and on reaching the Black Forest. Fermenter crafting materials: 30x Fine Wood, 10x Resin & 5x Bronze.
To use Fermentor you need to add an item into it from a cauldron.
Note: The fermenter needs to be craft indoors otherwise you will get a message that it’s too exposed.