Mix the first six dough ingredients. Then add eggs and milk and mix everything with the mixer to a dough. Spread the dough on a parchment-lined baking sheet.
Bake in the preheated oven at 180 ° C hot air (good medium heat) for approx. 20 minutes.
Spread with a topping immediately after baking. To do this, mix powdered sugar, espresso and butter and add so much hot water that it results in a viscous mass that you can just spread over the cake with the palette (tip: you can also use more boiled coffee instead of the hot water) .