Put 6 paper liners in the muffin tin (depending on the paper thickness of the cups, use 2 cups each).
Roughly chop the biscuits and distribute them in the molds.
Whip the sugar, egg, vanilla sugar and espresso until creamy. Whip 200 g cream until stiff and fold in. Distribute evenly in the molds. Freeze covered at least overnight.
Whip 100 g cream until stiff, decorate the tartlets and decorate with cocoa or chocolate.