For the heather sand cakes, melt butter in a small pot and brown lightly. Pour into a mixing bowl and let it cool down briefly. Add 125 g sugar, 1 packet of vanilla sugar, 1 pinch of salt and 200 g flour.
Knead first with the dough hooks of the mixer and then with your hands to a smooth dough.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Line baking tray with baking paper. Roll out the dough on a lightly floured work surface to a thickness of approx. 1⁄2 cm. Cut out approx. 8 circles (each approx. 8 cm Ø).
Put the thaler on the baking tray. Bake in the hot oven for about 12 minutes. Take out and let cool down on the baking tray.
Wash and clean the strawberries and cut into thin slices. Sort the raspberries, wash if necessary, dab dry. Mix 60 g sugar with 1 packet of vanilla sugar and cream stiffener. Whip the mascarpone and quark in a high mixing bowl for about 5 minutes with the whisks of the mixer.
Let the sugar mixture trickle in.
Spread each taler with 1 tsp. jam. Pour the mascarpone cream into a piping bag with a large perforated spout and spray carefully onto the thalers. Place 1 raspberry in the middle of each. Put the strawberry slices in the cream in a flowery shape all around.