Toss the roughly chopped dark chocolate into the mixing bowl and chop for 8 sec / speed 8. Scrape down the sides with a spatula and melt for 4 min / 50°C (120°F) / speed 1. Transfer all of the melted chocolate into a small bowl and set it aside for now.
200 g Heavy cream
Thoroughly clean the mixing bowl and rinse it with ice-cold water. Insert the butterfly whisk. Pour the cold heavy cream into the squeaky-clean bowl and whip on speed 3.5 for about 1.5 minutes until stiff peaks form. Transfer the whipped cream to a separate bowl.
1 tbsp Instant coffee granules, 1 tbsp Hot water
In a small cup, whisk the instant coffee granules with 1 tbsp of hot water until completely dissolved and smooth.
250 g Quark, 40 – 50 g Powdered sugar, 1 packet Vanilla sugar, 1 pinch Salt, 1 tbsp Instant coffee granules, 1 tbsp Hot water
Add the quark, powdered sugar, vanilla sugar, a pinch of salt, and the dissolved coffee to the mixing bowl. Whip it up for 2 min / speed 4 (with the butterfly whisk still in) until beautifully creamy.
200 g Heavy cream
Gently fold the coffee-quark mixture into the whipped cream using a spatula until just combined.
100 g High-quality dark chocolate
Layer the mousse and the melted chocolate into your serving glasses. For a gorgeous finish, swirl the top layer of chocolate in a spiral motion to create a marbled effect.
Chocolate shavings, Fresh mint leaves
Chill the dessert in the fridge until you're ready to serve. Right before serving, garnish with chocolate shavings and fresh mint leaves. Enjoy!