Dissolve coffee powder in 6 tablespoons of hot water and let it cool down.
Mix mascarpone, quark, half coffee and 50 g sugar. Whip the cream until stiff, while pouring in 2 tablespoons of sugar. Fold the cream into the mascarpone cream. Carefully swirl the rest of the coffee into the cream.
Carefully pour the mascarpone cream into four glasses (each containing approx. 200 ml) and sprinkle each with 1 tablespoon of chocolate-coated coffee beans. Dust with icing sugar.