But Sobachatina seems very adamant about this being a BAD time to disturb the fudge, as it will cause crystal formation. 그렇다면 퍼지를 저어서는 안 된다면 버터와 바닐라는 어떻게 넣어야 하나요? Butter is typically added when the fudge is first taken off the heat but it isnt mixed in.