the baking of marble cake

found this simple recipe from this site

INGREDIENTS (Nutrition)
2 cups all-purpose flour
2 teaspoons baking powder
1/2 teaspoon salt
1 cup white sugar
1/2 cup butter, softened
2 eggs
1 teaspoon vanilla extract
1 cup milk
2 tablespoons unsweetened cocoa powder

DIRECTIONS
Preheat oven to 350 degrees F (175 degrees C).

Grease and flour a 9 inch round pan.
Place flour, baking powder, salt, sugar, butter or margarine, eggs, vanilla, and milk into mixing bowl.

Beat slowly to moisten, then beat with an electric mixer at medium speed for about 2 minutes until smooth.

Reserve 3/4 cup batter; pour the remainder into pan.
Stir cocoa into the 3/4 cup reserved batter.

Drop by spoonfuls over top of white batter.

Using a knife, swirl the cocoa batter into the white batter to incorporate it in a marble effect.
Bake in preheated oven for 30 to 35 minutes, until an inserted wooden pick comes out clean.

* the ingredients *

* the mixture of all ingredients minus the cocoa powder *

* before baking *

* after baking *

* the end result: too oily coz i used too much of butter *