The butter is allowed to melt across the surface to keep it from forming a skin on top. 바닐라, 견과류 및 기타 모든 첨가물은 퍼지를 저어주는 식힘 시간이 끝날 때 섞어줍니다. Alton Brown, with some help from Shirley Corriher, explained the process well.