Finely grind the peanuts. Put butter in flakes, flour, sugar; salt and peanuts in a mixing bowl and work well with the dough hooks of the hand mixer. With cool hands quickly knead to a smooth dough.
Wrap in foil and refrigerate for about 1 hour. Halve the dough. Roll out thinly in portions on a lightly floured work surface. Cut out 64 hearts (approx. 6 cm). Cut out the middle of half of the hearts with a small heart shape.
3 baking trays lined with baking paper. Place hearts on the baking trays. Whisk the egg yolks with cream and coat the hearts. Bake one after the other in a preheated oven (electric: 200 °C/ gas: level 3) for 8-10 minutes until golden brown.
Let it cool down on a cake rack. Warm the jelly in a saucepan. Allow to cool slightly until it becomes thick again. Spread the jelly on the biscuits without a hole and place the edge of the heart on top. Dust all cookies with icing sugar.