You need:
- 165 g butter
- 165 gr dark chocolate
- 250 gr sugar
- 115 gr plain flour
- 3 eggs
- 1 teaspoon vanilla extract
- a pinch of salt
Melt the butter and chocolate in the microwave ( 50 second at high temperature; if it is not melted put it back another 20 seconds and so on). Separately mix the eggs, sugar an vanilla and add it all to the butter and chocolate (do this carefully if the chocolate is still hot). Combine the flour and salt and add it to the mixture. Put it all on a lined tin and bake on a 180 degrees preheated oven for 25 minutes.
