Preheat the oven to 180°C (370°F).
Beat the butter and sugar well.
Stir in the eggs and a pinch of salt one after the other. Then stir in the flour and baking powder.
Place a teaspoon of batter in each muffin liner.
Mix the milk and cocoa powder into the remaining batter.
Divide the remaining dark batter between all the liners. Press a cherry into each muffin.
Bake for 10-12 minutes. Let cool.