Mix the egg yolk and espresso powder. Mix the baking mix, cinnamon, fat and egg yolk with the dough hooks of the hand mixer and knead into a smooth dough with your hands. Form the dough into a roll, cut into 36 slices and shape each into a croissant. Place on a baking tray lined with baking paper and bake in a preheated oven (electric range: 175°C/ gas: level 2) for 15 minutes.
Remove the croissant from the oven and let it cool down on a cake rack. In the meantime, melt the chocolate coating in a hot water bath and let it cool down a little. Pour into a small freezer bag, cut off a small corner and decorate the croissants with strips. Results in 36 pieces