Finely chop the candied orange peel and mix with cornflour. Coarsely grate the raw marzipan paste and place in a mixing bowl. Sift icing sugar over it, add egg white and liqueur. Mix to a smooth mixture with the whisk of the hand mixer.
Stir in the orangeate mixture. Using a damp spoon, divide the marzipan-orangeate mixture into 20 equal portions. Form 20 balls from the portions with moistened hands and place them on a baking tray covered with baking paper.
Whisk the egg yolks and milk, spread on the balls and immediately sprinkle with pistachio kernels. Bake the balls in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 15 minutes until golden brown.
Place the baking tray on a cake rack and let the balls on it cool down.