Bring the almonds to the boil in a small pan with a little water and simmer for about 3 minutes at medium heat. Pour onto a sieve, quench and press the almonds out of the skin. Cut the almonds in half lengthwise with a small knife.
Roughly dice the marzipan. Pass the icing sugar and flour through a fine sieve. Separate the egg. Put the egg white, icing sugar, flour and marzipan in a bowl and mix to a smooth mixture with the dough hooks of the hand mixer.
Turn into small balls with moistened hands. Place on a baking tray lined with baking paper. Whisk egg yolk and cream. Brush the balls with it. Press three almond halves on each ball.
Bake in the preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: level 1) for approx. 20 minutes. Remove from the oven, place on a cake rack and allow to cool.