Bottom:
Preheat the oven to 175 degrees. Mix all the ingredients together. Attach a piece of baking paper to the bottom of a small 12-cm springform pan and press out the dough. Bake in the center of the oven for about 10 minutes.

Chocolate filling:
Melt the chocolate in a water bath. Whisk together the eggs and mascarpone. Add the melted chocolate, chocolate drink and extra sweetener and mix until combined. Spread over the base and bake in the middle of the oven for about 25 minutes.

Tip: Quadruple all ingredients and extend the baking time slightly for a 24 cm springform pan.