When preparing the short pastry, knead in the cocoa and rum. Roast the almonds in a pan without fat and let them cool down. Halve the walnuts. Roll out the dough 2-3 mm thin on a floured work surface and cut out half of the flowers of about 5 cm Ø.
Using a dough wheel, work the remaining dough into rectangles measuring 5,5 x 3,5 cm. Spread the flowers and cookies on two baking trays lined with baking paper. Spread the cookies thinly with milk. Separate the egg.
Mix sugar and spices. Beat the egg white until stiff and finally stir in the sugar mixture and lemon juice. Pour meringue mixture into a piping bag with a large star-shaped spout and spray a large tuff on the flowers and three small tuffs on the cookies.
Decorate with walnuts and almonds as desired. Brush the almonds with egg yolk as desired. Bake the trays one after the other in a preheated oven, 2nd shelf from below (electric oven: 150 °C/ convection oven: 125 °C/ gas: stage 1) for 18-20 minutes.
Let it cool down on a cake rack.