For the stomach bread, fold in cocoa, spices and coffee. Mix flour and baking powder and stir into the fluffy mixture by the spoonful.
Knead everything by hand until a soft, smooth dough is formed.
Form rolls of dough about 3 cm in diameter and flatten them slightly. Place on a baking tray lined with baking paper.
Preheat the oven to 180 degrees Celsius and bake on the second rack from the bottom for 20-30 minutes until not completely cooked through.
Remove and cut into 1-2 cm thick slices while still hot. Allow to cool.
For the glaze, sift powdered sugar and cocoa and boil in water until the liquid drips from the ladle like a thread.
Remove the skillet from the heat and stir in butter.
Dip the gastric bread slices in the hot glaze and let them set on a baking paper.