Blueberry Cake
["1 1/2 c. flour", "1 tsp. baking powder", "1/2 tsp. salt", "2 egg whites", "1/2 c. shortening", "1 c. sugar", "2 egg yolks", "1/3 c. milk", "1 tsp. vanilla", "1 1/2 c. blueberries", "flour (for blueberries)"]
["Sift together flour, baking powder and salt.", "Set aside.", "Beat egg whites until stiff.", "Set aside.", "Cream shortening and sugar; add well beaten egg yolks.", "To this, add alternately the flour mixture and the milk.", "Fold in egg whites and vanilla.", "Add floured blueberries.", "Use a 9 x 9-inch pan or a tube pan, either should be greased and floured.", "Sprinkle batter with sugar for a topping.", "Bake at 350\u00b0 for 45 to 50 minutes.", "Very good."]
["flour", "baking powder", "salt", "egg whites", "shortening", "sugar", "egg yolks", "milk", "vanilla", "blueberries", "flour"]