Try this delicious cake recipe:
Cream the butter with marzipan, sugar and egg yolks.
Gradually stir in the flour. Fill the soft mixture into a piping bag with a rosette nozzle. Pipe small nests onto baking sheets lined with parchment paper, leaving a bulge on the inside for the filling. Bake in a heated oven at 175 °C (gas: level 2) for 15 min. Place on a wire rack to cool. Mix powdered sugar with juice of one lemon to a thick cream, fill the cooled nests with it. Decorate with some love pearls or colorful sprinkles.