How to make
The butter should be soft and the mascarpone and condensed milk should be taken out from the fridge.
In a bowl, beat the softened butter for about 2 minutes.
In another bowl, beat the mascarpone and condensed milk, until a homogeneous mixture is obtained.
Add the butter to the mixture and mix gently with a spatula until a homogeneous mixture is obtained.
The fluffy cake cream with condensed milk is ready.