Ingredients:
130 g (4.5 oz) butter
3 egg yolks
200 g (7 oz) sugar
250 g (0.5 lb) flour
50 g (1.7 oz) chocolate, melted
6 Tbsp milk
grated zest of 1/2 lemon
1 Tbsp rum
3 egg whites
1/2 tsp baking powder

Preparation:

1. Whisk the egg whites until stiff.

 

2. In separate bowl cream butter, egg yolks and sugar together until foamy. Add flour, baking powder, milk, lemon zest and beaten egg whites.

 

3. Pour 1/2 of batter in separate bowl. Stir in melted chocolate. Spoon batters alternately into greased and floured bundt pan. With large spoon, cut and twist through batters to marble.

 

4. Bake at 165 C (330 F) for 30 to 45 minutes or until toothpick inserted into center comes out clean.