First mix the spelt flour with the wheat flour.
Quickly knead together with the cocoa, the butter cut into thin slices, the agave syrup, the vanilla sugar and the grated almonds to form a dough.
Then mix in tangerine zest, cinnamon and salt. Chill in the refrigerator for 30 minutes, then roll out the dough and shape into croissants.
Bake at 180 °C for about 10 minutes. Roll in a mixture of powdered sugar and vanilla sugar while still hot.