Grease the 12 troughs of a muffin tray. Unroll the puff pastry and roll out slightly larger (approx. 26 x 45 cm) on a little flour. Cut out 12 circles (each approx. 10 cm Ø) from the dough. Place the dough circles in the hollows, press them on the edges and chill.
Stir 5 tablespoons of milk and 2 tablespoons of flour until smooth. Warm up the rest of the milk. Break chocolate into pieces and melt in it. Stir in sugar, 1 pinch of salt and gingerbread spice, bring to the boil. Stir in the flour and simmer for 2-3 minutes.
Take the pot off the stove. Whisk egg and egg yolk together. First stir in 3 tablespoons of hot chocolate milk, then stir into the rest of the chocolate milk. Spread into the hollows.
Bake the cakes in a preheated oven (electric oven: 225 °C/circulating air: 200 °C/gas: level 4) for 12-15 minutes. Let them cool down and dust with cocoa. Decorate with raspberries if desired.