Why choose between Vanilla and Chocolate when you can have the best of both worlds?
What you need:
175 grams butter
175 grams caster sugar
3 eggs, beaten
175 grams self-raising flour
25 grams cocoa powder, sifted
6 tablespoons orange juice
Grated rind of one orange
Preheat the oven to 170 degrees. Lightly grease a 10� pan. In a mixing bowl, cream together the butter and sugar with an electric whisk for about 5 minutes.
Add the beaten eggs a little at a time, whisking well after each addition.
Using a metal spoon, fold the flour into the creamed mixture carefully then spoon half the mixture into a separate mixing bowl.
Fold the cocoa and half of the orange juice into the mixture in one of the bowls and mix gently.
Fold the remaining orange juice and orange rind into the mixture of the other bowl and mix gently. Alternate spoonfuls of each in the pan and then with a wooden tip, pass along the mixture to create a marbled effect. Bake for about 25 minutes.