Preheat the oven to 250 degrees. Separate eggs. Mix egg yolks with icing sugar until creamy. Mix the marzipan with 250 g butter, fold in. Beat egg whites with 70 g sugar until stiff. First fold the flour with starch and then the egg whites into the dough. Line an oven-safe rectangular shape (1928 cm) with baking paper. Spread the dough approx. 2 mm thin, bake for 3-4 minutes. Repeat the process until the dough is used up. Turn the cake out of the pan and let it cool down. Cut out crescents. Heat the cream with 30 g sugar and 40 g butter. Melt the chocolate in it. Stir in espresso. Dip half moons in the glaze and allow to dry.