The production of nut butters is surprisingly uncomplicated: The nuts are finely ground in a large kettle. The constant movement creates friction and therefore heat. This is where the exciting part happens:
- the cell structures of the nuts break open,
- the oil stored in them escapes,
- Oil and nut pieces combine with each other.
The result is the typical, uniform, paste-like consistency that we are all familiar with. The puree then goes straight into the jar, is sealed, labeled - and that's it.
Why oil sometimes separates
Particularly with varieties without additives - such as cashew butter or almond butter - a layer of oil can form at the top of the jar after a while. This is completely normal because we work without emulsifiers. They prevent the oil and the solid nut components from separating again.
Solution: stir once and the puree is as creamy as before.
Tip: if you store the jar in the fridge, the oil will separate much more slowly.