For the cream, chop whole milk chocolate. Warm the cream. Melt nut nougat and chocolate in it. Stir in 50 g sugar, 2 packets of vanilla sugar, 1/2 teaspoon salt and 25 g cocoa powder. Pour into clean glasses and chill.
In the meantime, chop the dark chocolate into large pieces. Whisk buttermilk and egg. Mix chocolate, flour, baking powder, baking soda, 1 packet of vanilla sugar, 50 g sugar, 1/4 teaspoon salt and 2 teaspoons cocoa.
Cut butter into cubes and add to the flour mixture. Mix quickly with your fingertips to a coarse crumbly dough. Stir in the buttermilk and egg mixture briefly. Stir only until just enough to form a dough.
Place the dough on a floured work surface and roll out into a rectangle about 1.5 cm high. Cut in half crosswise and cut into 6 rectangles of the same size. Place scones on a baking tray lined with baking paper and bake in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: see
manufacturer) bake for about 18 minutes. Remove and let cool on a cake rack.
Cut scones in half horizontally. Spread the undersides with approx. 2 tbsp. chocolate-nut-cream each, place the topsides on top. Use the rest of the chocolate-nut-cream for other purposes.