Marble Cake - cooking recipe

Ingredients

3 3/4 c. regular flour
3 tsp. baking powder
dash of salt, mixed with flour
1 3/4 c. sugar
1/2 lb. butter or margarine
4 eggs, separated
1 1/2 tsp. vanilla
2 tsp. rum extract
1 1/4 c. milk
2 Tbsp. cocoa, mixed with 3 Tbsp. sugar and 3 Tbsp. milk

Preparation

Cream butter well.
Add sugar, a little at a time.
Add egg yolks, one at a time.
Add vanilla; beat until very fluffy.
Add rum.
Beat again.
Slowly add flour and milk, alternately, a little at a time until all used up.
Beat egg whites until very fluffy and fold into other mixture.
Put 2/3 of mixture into greased baking pan (Bundt).
To the remaining 1/3 of mixture, add the cocoa mixture and put it on top of the other mixture in the baking pan.
With a fork or spoon, make marble design.
Bake at 325\u00b0 for 1 1/4 hours.