Briefly mix the milk, 5 tbsp. egg liqueur and cream powder with the whisks of the hand mixer at the lowest setting, then whip at the highest setting for 3 minutes. Fold chocolate, except for a little bit underneath
Break biscuits into large pieces. Divide half into 4 dessert glasses and sprinkle with 6-8 tbsp. advocaat. Layer half the cream, the rest of the biscuits and the cream on top of each other. Chill for at least 1 hour.
Whip the cream until stiff. If necessary, fill into a piping bag with star-shaped spout. Place as tuffs on the cream. Pour the rest of the eggnog and chopped chocolate over it. Possibly decorate