Mix the spelt flour with the chestnut flour in a bowl and form into a wreath.
Add honey, gingerbread spice, whole cane sugar, baking powder, molasses, milk and orange zest and knead everything together to form a dough. Cover dough and let stand in a cool place for one night.
One day later, roll out about 5 mm thick, cut out hearts and place on a baking tray with baking paper.
Bake in a preheated oven at 220 °C, in a hot-air oven at 190 °C, for about ten minutes, remove and let the gingerbread hearts cool on a cooling rack.