This recipe is from the 1940 Culinary Arts Institute cookbook. Enjoy! Poundcake to come . . .

Chocolate Marble Cake

PART 1
2-1/3 cups sifted cake flour
2-1/4 t. baking powder
1/4 t. salt
1/2 c. shortening
1 cup sugar
1 egg, well beaten
2 egg yolks
1 t. vanilla
3/4 c. milk

PART 2
2-1/2 oz. (squares) chocolate, melted
1/2 t. baking soda
3 T. sugar
2 T. shortening
1/4 t. salt
1/4 c. hot water

Sift flour, baking powder and salt together. Cream shortening with sugar until fluffy. Combine egg and egg yolks, beat well, add to creamed mixture with vanilla and beat thoroughly. Add sifted dry ingredients and milk alternately in small amounts, beating well after each addition. Combine ingredients of part 2 in order given. Blend thoroughly. Divide batter as follows: Leave 1/3 of the batter white and to the other 2/3 add chocolate mixture (part 2). Blend well. Drop batter by tablespoons into greased pan, alternating white and chocolate batters. Bake in moderate oven (350) about 1 hour. Makes 1 8" cake.