Coarsely chop 175 g of couverture and melt on a warm water bath. Leave to cool slightly. Coarsely chop nuts and almonds. Caramelise 4 tablespoons of sugar, add nuts and roast in it. Spread thinly on baking paper and let cool and chop.
Cream fat, salt, 1 packet of vanilla sugar and 200 g sugar with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour and baking powder and stir in. Let the chocolate coating shrink while stirring constantly. Fold in brittle.
Grease mini-ball cake troughs (6 pieces of 250 ml each) of a muffin tray and dust with flour. Spread the dough evenly in the troughs. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for 30-40 minutes. Remove from the oven, leave to rest for 10 minutes, turn out of the tin onto a grid and allow to cool.
Coarsely chop 150 g of chocolate coating and melt it on a warm water bath. Cover the muffins with it. Leave to dry.