Separate the eggs for the dough. Put fat, icing sugar, flour, cocoa, 1 egg yolk and salt in a mixing bowl. Mix with the dough hooks of the hand mixer. Then work into a smooth dough with cool hands.
Wrap in foil and chill for about 30 minutes. In the meantime grind the pistachios finely. Halve the dough. Roll out between 2 layers of foil to plates (approx. 15 x 20 cm). Knead the marzipan and prepare as well.
Spread the dough plates with egg white. Place marzipan plate on top. Brush again with egg white and sprinkle with half of the ground pistachios. Wrap it firmly into a roll with the help of the foil. Put in a cool place for about 2 hours.
Then brush with the remaining egg yolk. Mix remaining pistachios and sugar. Roll the roll in it. Cut into thin slices and place on a baking tray lined with baking paper. Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 12 minutes.
Results in about 17 pieces per roll.