1. Preheat the oven to 180 degrees Celsius.

2. Grease a round cake pan and dust with flour.

3. Melt 200 grams of dark chocolate in a bowl.

4. In a separate bowl, mix 200 grams of butter with 200 grams of sugar until creamy.

5. Gradually add 4 eggs and mix well.

6. Add the melted chocolate and mix well.

7. Add 200 grams of flour and 1 teaspoon of baking powder and gently fold in.

8. Pour the batter into the prepared cake pan.

9. Sprinkle 100 grams of berries (such as raspberries or blackberries) on top of the batter.

10. Bake the cake in the preheated oven for about 40 minutes, or until set.

11. Allow the cake to cool, then sprinkle with powdered sugar.

12. Serve and enjoy!