First whip the sweet cream until stiff. Then mix the mascarpone, curd cheese, sugar and vanilla sugar and fold into the whipped cream.
Spread half of the cream in a baking dish, put the speculoos on top and the slightly defrosted berries on top of the biscuits. Then distribute the rest of the cream on the berries and refrigerate the dessert for at least five hours so that the biscuits become soft.
Sprinkle with powdered sugar and cinnamon before serving.
The recipe is enough for 6 large servings or 10 small ones.