Preparation: Pour the milk into a narrow, tall mixing bowl. Add cream powder and mix briefly with the whisks of the hand mixer on the lowest setting. Whip everything from the highest setting until creamy. Add 30 ml liqueur. Whip cream until stiff and carefully fold in half with a dough scraper. Chill the rest of the cream
Put the rest of the liqueur in a bowl. Dip both sides of the lady fingers briefly into the liqueur. Pour the chocolate cream into the glasses (200 ml content each) and put the lady fingers into the cream. Melt the sugar in a pan over a mild heat. Add the walnuts, turn in the caramel and place on oiled aluminium foil and leave to cool. Spread the rest of the cream on the glasses and serve with walnut brittle. Decorate with mint if desired.