Cream fat, 75 g sugar, 1 packet vanillin sugar and salt with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour and baking powder and stir in portions. Grease a springform pan (24 cm Ø) and sprinkle with breadcrumbs. Fill in the dough and smooth it down. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 20 minutes. Let it cool down on a cake rack and take it out of the tin.
Put the sour cream, cream, amaretto, 25 g sugar and 1 packet of vanillin sugar into a mixing bowl and beat until stiff with the whisks of the hand mixer. At the same time, allow cream stabiliser to trickle in. Halve the Amarettini, except for a few for decoration. Sort the blueberries, wash and drain. Fold 200 g blueberries and amarettini halves into the cream and spread on the cake base in a wave shape. Spread the rest of the Amarettini crumbled or whole with the remaining blueberries on the cake and press lightly. Decorate with mint and serve