Butter an8-9- inch bowl and place slices of biscuit roll from around the sides, fitting them tightly together so that there are no spaces for the filling to seep through.

• 将蛋糕卷排入一个抹油的8-9寸碗具，尽量将蛋糕圈都排得紧凑些，这样慕斯馅不会过多渗出来。