Preheat the oven to 170°C, 160°C fan oven, Gas mark 4.
Place all ingredients except the chocolate in a bowl and beat with a spoon or mixer for 3-4 minutes.
Put 150g chocolate in a bowl over a pan with boiling water and melt the chocolate (make sure no water splashes into the chocolate!)
Stir the chocolate until smooth, mix into the batter and fold in the remaining chocolate (chips).
Spoon the batter into the prepared tin.
Bake in the preheated oven for 50-60 minutes. Remove the cake from the oven and leave to rest in the tin for 2 minutes. Turn the cake out onto a wire rack and cool. Cut the cake into slices.
- Temperature: 170 oC
- Baking time:
- Serves: 14