Modern Marble Cake
["1 3/4 c. flour", "2 tsp. baking powder", "1/2 tsp. salt", "1/2 c. shortening", "1 c. sugar", "2 eggs, beaten", "1/2 c. milk", "1 tsp. vanilla", "1 oz. sq. chocolate or 3 Tbsp. cocoa plus 1 Tbsp. oil equals 1 sq. (1 oz.) baking chocolate", "2 Tbsp. milk"]
["Sift flour, baking powder and salt together.", "Cream shortening with sugar until fluffy.", "Beat eggs thoroughly and add sifted dry ingredients and milk alternately, beating well.", "Add vanilla. Divide batter into halves.", "Melt chocolate and add with 2 tablespoons milk to one half; blend well.", "Drop batter by tablespoons into greased pan, alternating white and chocolate. Bake at 350\u00b0 for 50 to 60 minutes.", "The fun of baking a marble cake is to see what designs come through."]
["flour", "baking powder", "salt", "shortening", "sugar", "eggs", "milk", "vanilla", "chocolate", "milk"]