Surprise Cupcakes

Directions

1. Preheat oven to 400 degrees Fahrenheit.
2. Melt 100 grams of butter and the dark chocolate in a double boiler.
3. In a medium-sized bowl, mix the eggs, sugar, and vanilla sugar. Add the melted butter and melted chocolate and stir to combine.
4. Mix the flour and baking powder and add them to the mixture.
5. Fill the muffin cups until half full.
6. Add a mini milk and hazelnut chocolate square in the center of each muffin. Cover with the remaining batter.
7. Bake for 15 minutes at 400 F.
8. For the vanilla icing, whisk 120 grams of softened butter in a bowl and gradually stir in the powdered sugar.
9. Add the vanilla extract and food coloring until obtaining the desired color.
10. Using a pastry bag, form a rosette of vanilla icing on top of each cooled muffin.
11. Then, place your cupcakes in the refrigerator to allow the icing to harden. Decorate according as you wish.