Preheat the oven to 180 degrees Celsius for a fan oven. Finely grate the courgettes. For the brownie batter, melt the chocolate in a water bath.

Mix all dry ingredients in a large bowl. Add the remaining ingredients (apart from the chocolate drops) and stir until a relatively homogeneous mass has formed.

Grease a rectangular baking or casserole dish (approx. 28 x 20 cm) and pour in the brownie batter. Scatter the chocolate chips on top and gently work into the batter. Now bake everything for about 30 minutes. Take out and let cool.