Bring 440 ml milk to the boil. Stir pudding powder, 2 tablespoons sugar and remaining milk until smooth. Stir into the boiling milk, bring to the boil and simmer for about 1 minute. Remove from the heat, pour into a bowl and cover directly on the surface with foil.
Leave to cool for at least 2 hours.
Cream 150 g butter, 150 g sugar and vanilla sugar with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour and baking powder and stir in. Halve the dough, mix one half with cocoa powder and 1 tablespoon of milk.
Drain the cherries and let them drain well. Line the hollows of a muffin tray (12 hollows) with paper cups. Spread the light, then dark pastry into the paper cups. Spread the cherries, up to 12 pieces for decoration, on the dough and press them in slightly.
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 20 minutes. Take out and let cool down.
Chopping chocolate. Bring the cream to the boil in a pot, remove from the heat and stir in the chocolate until a smooth glaze is obtained. Let it cool down for about 10 minutes. Cream butter with the whisk of the hand mixer.
Mix the pudding with the butter by the spoonful. Pour the butter cream into a piping bag with a large star-shaped spout and squirt it onto the muffins in large tuffs. Spread the icing on the buttercream. Decorate each muffin with 1 cherry.