Preheat the oven to 200 ° C top / bottom heat. Put paper liners in a muffin tin.
Beat the eggs with sugar until frothy. Add the softened butter, flour, baking powder, cornstarch, salt and 4 tablespoons of amaretto and mix well. Now cut the marzipan (with a dampened knife) into small pieces and fold into the dough. Pour the dough evenly into the molds.
Bake in the hot oven for about 20-25 minutes.
Now mix 50 g of powdered sugar with 2 tablespoons of amaretto. Pour this topping over the muffins and let them set.