Chocolate Marble Cake

Ingredients

• 1 cup (2 sticks) butter
• 2 cups granulated sugar
• 6 egg yolks
• 1 cup milk
• 2 cups all-purpose flour
• 6 egg whites
• 1 packet (approx. 0.5 oz) baking powder
• 1 tsp vanilla sugar or 1 tsp grated lemon zest
• 2 tablespoons cocoa powder

Method

1. 1 Cream butter and sugar together for 15 minutes until light and fluffy.
2. 2 Beat in egg yolks one at a time, then mix in milk and flour until smooth.
3. 3 Fold in stiffly beaten egg whites and baking powder. Stir in vanilla or lemon zest.
4. 4 Divide batter in half. Mix cocoa powder into one half until fully incorporated.
5. 5 Alternately spoon dollops of plain and chocolate batter into a buttered pan.
6. 6 Bake at 350°F for 1 hour until a toothpick inserted in the center comes out clean.