Marble Cake - cooking recipe

Ingredients

1 box white or yellow cake mix
1 1/2 squares melted chocolate
1 1/2 Tbsp. sugar
3 Tbsp. water
1/4 tsp. soda

Preparation

Mix cake mix according to package directions.
To 1/3 of batter add chocolate, sugar, water and soda.
Cut this mixture into remaining 2/3 batter with a spatula.
Bake at temperature and time indicated on cake mix box.