Marble Bundt Cake

Directions

1. 1
   Cream the butter with 200 gr. of sugar and the vanilla extract until foamy.
2. 2
   Add the egg yolks, one at a time.
3. 3
   Then add 2 tbsp. of flour, the milk and the grated lemon peel.
4. 4
   Beat the egg whites, add the remaining sugar, and continue beating until stiff peaks form.
5. 5
   Sift the flour with the baking powder.
6. 6
   Carefully fold the egg whites and the flour into the butter mixture.
7. 7
   Divide the batter into two bowls, adding the cocoa, the chocolate, and the rum to one bowl.
8. 8
   Place half of the plain batter in a buttered and floured bundt cake pan, then add the chocolate batter and last, the remaining plain batter.
9. 9
   Use a fork to create the marble effect by swirling it around in the batter.
10. 10
    Bake at 180C for approximately 50 to 60 minutes until a toothpick inserted in the center comes out clean.
11. 11
    Cool the cake and sprinkle it with powdered sugar.