Preheat oven Electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Place paper baking cups in the twelve troughs of a muffin tray.
For the dough, roughly chop the chocolate coating and melt in a hot water bath. Leave to cool a little. Cream butter, 150 g sugar, 1 packet vanilla sugar, 1⁄2 teaspoon cinnamon and 1 pinch of salt with the whisks of the mixer. Stir in the eggs one by one. Mix flour, baking powder and cocoa and stir in alternately with the milk. Stir in liquid chocolate coating.
Spread the dough evenly into the paper baking cups. Bake in the hot oven for about 25 minutes. Remove from the oven and let cool on a cake rack for about 30 minutes. Carefully remove the muffins from the trays and let them cool completely.
Whip the cream until stiff. Mix mascarpone, 75 g sugar and 1 packet of vanilla sugar briefly. Fold in several portions of cream. Pour cream into a piping bag with a large perforated spout and squirt onto the muffins as large tuffs.
Smooth out the liquorice strings and place 1 string per muffin as a fairy lights spiral around the cream. Decorate with chocolate lentils just before serving, otherwise they will discolour the cream.