Zubereitung

1. 1

   Heat the oven to 180 °C and grease a bundt tin generously with butter, then dust it with a little flour.

2. 2

   Beat the soft butter with sugar, vanilla sugar and a pinch of salt until pale and fluffy, then beat in the eggs one at a time.

3. 3

   Combine flour and baking powder and fold into the batter alternately with the milk until smooth.

4. 4

   Pour two thirds of the batter into the tin. Stir the cocoa and a splash of milk into the rest and spoon it on as a dark layer.

5. 5

   Drag a fork through both layers in a spiral motion to create the marble pattern.

6. 6

   Bake on the middle rack for 50 minutes until a skewer comes out clean.

7. 7

   Let the cake rest in the tin for 15 minutes, then turn out and cool completely.