Cream fat, sugar, vanillin sugar and salt with the whisk of the hand mixer. Stir in the eggs one after the other.
Mix flour and baking powder. Finely chop the chocolate. Alternately stir milk and flour into the fat mixture. Stir in chocolate. Line recesses of a muffin tray (12 recesses) with paper cups.
Spread the dough evenly and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 20 minutes. Remove and let cool on a cake rack.
Unroll liquorice snails and cut into pieces for mouth, nose and eyes. For the eyes roll up the pieces. Sift icing sugar and mix with lemon juice. Spread about 1 tbsp. icing on each muffin and make faces with pieces of liquorice.
Let the casting dry for at least 1 hour.