Halve the almonds lengthwise. Coarsely grate the marzipan. Separate the egg. Mix icing sugar and flour, knead with marzipan and egg white with a hand mixer
Form approx. 35 balls from the marzipan mixture with moistened hands. Place them on a baking tray lined with baking paper. Whisk egg yolk and cream. Spread the balls with it. Press 3 almond halves on each side
Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for 15-20 minutes. Let them cool down. Dust with icing sugar