Preheat the oven to 180°C, prepare the baking tins. Melt 100g of dark chocolate with 100g of milk chocolate and butter over a hot water bath. Leave to cool.
In a bowl, mix the eggs with sugar until white and creamy. Add all kinds of flour and melted chocolate and stir with a spoon. Fill the muffin tin and bake for about 15 minutes. Leave to cool.
Sprinkle with icing sugar and cinnamon right before serving.
GF – make sure the ingredient doesn’t contain traces of gluten!