Finely grind the walnuts in the universal chopper. Cream butter and 50 g icing sugar. Add nuts, flour, salt, 1/2 packet of orange fruit and egg yolk and knead to a smooth dough. Wrap in foil and chill for about 1 hour. Mix the rest of the orange fruit with 20 g icing sugar in a mortar. Stir in 30 g icing sugar and cinnamon. Divide the dough into cherry-sized portions and form into approx. 8 cm long croissants on a floured work surface.
Place on 3 baking trays lined with baking paper. Bake the trays one after the other in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 20 minutes. Allow to cool for a few minutes, roll in the orange-cinnamon sugar while still warm. Mix 50 g icing sugar with 1 teaspoon of water. Pour the icing into a freezer bag, cut off a small corner. Stick the candied petals onto the croissants with a spot of icing
Waiting time approx. 1 hour