Cream the icing sugar and butter together with an electric mixmaster.
Add the egg and egg yolk and mix well.
Mix the cocoa and flour well and add it to the butter mixture and mix well.
(mixture should be light)
Cover with clear plastic and leave in the fridge for at least 2 hours.
Roll the dough out on a flour covered surface and make small cookie cups out of the dough.
Prick the bottom of the cookie cups with a fork and put baking paper on top.
Bake for 12 minutes at 200 degrees c.
Make both fillings at the same time.
Beat the sugar,egg and egg yolks with an electric mixer until it's light and creamy.
Melt the chocolate and butter together in a bowl.
Add the chocolate to the egg mixture and mix well.
Fill the tartlets with both mixtures and bake for 15 minutes at 190 degrees c.