Berry Quark Pie

For the crust, coarsely grate the cold butter. Combine the butter with flour, baking powder, half the sugar, half the vanilla sugar, and a pinch of salt. Rub the butter and flour together well until crumbly.

For the filling, mix the quark with the remaining sugar and eggs. Blend until smooth.

Line a baking pan with parchment paper. Press the dough into the pan, building up the edges. Pour in the quark filling. Bake in the oven at 180°C (350°F) for 40–50 minutes. The filling may rise significantly; let it settle before adding the berries.