Sift almond flour and sweetener together
Baking powder, eggs, heavy cream, melted butter, and a drop of vanilla
Microwave for 2 minutes (adjust time as needed)
Mix egg yolks with sweetener, loosen mascarpone cheese, add vanilla
Spread coffee dissolved in water (20ml) onto the cake layer
Add cream, cover with plastic wrap, chill in refrigerator for 6 hours
Make custard