This is an old recipe clipping that looks to be an advertisement from a magazine for Calument Baking Powder. There is no date but this was in a stack of recipe clippings from the 1920s thru 1950s. You can click the picture to view a larger image of the recipe.

PLANTATION MARBLE CAKE
(2 eggs)

2 cups sifted Swans Down Cake Flour
2 teaspoons Calumet Baking Powder
1/4 teaspoon salt
1/2 cup butter or other shortening
1 cup sugar
2 eggs, well beaten
3/4 cup milk
1 teaspoon vanilla
1 teaspoon cinnamon
1/2 teaspoon cloves
1/2 teaspoon nutmeg
2 tablespoons molasses

Sift flour once, measure, add baking powder and salt, and sift together three times. Cream shortening, add sugar gradually, and cream together until light and fluffy. Add eggs and beat well. Add flour, alternately with milk, a small amount at a time, beating after each addition until smooth. Add vanilla. Divide batter in two parts. To one part, add spices and molasses. Put by tablespoons into greased loaf pan, 9x5x3 inches, alternating light and dark mixtures. Bake in moderate oven (350° F.) 1 hour, or until done. Or bake in greased pan, 8x8x2 inches in moderate oven (350° F.) 50 to 55 minutes, or until done. Cover top and sides of cake with your favorite frosting.

(All measurements are level.)

CALUMET
THE DOUBLE-ACTING BAKING POWDER