Birthdaeus Griftarium & Cauldron Recipes

[leader of expedition 69]

Probably a super obvious question, but how do you go about unlocking the Abundance potion recipe and other potion recipes? Aside from the basic potion recipes, they're all locked for me

[worstcase11]

I found a few as recipes for potions in treasure chests but not sure which exactly.

[BootBoot]

chest RNG sadly

[Col. Fagnificent]

The Random Recipe you buy from Paolo can also unlock a Potion recipe too....Randomly of course