Blueberry Cake

1 1/2 cups flour
1 teaspoon baking powder
1/2 teaspoon salt
1/2 cup shortening
1 cup sugar
2 egg yolks
1 teaspoon vanilla
1/3 cup milk
2 egg whites, beaten until soft peaks form
1 1/2 cups blueberries
1 tablespoon sugar for topping

Grease and flour an 8-inch-square pan. Set oven at 350 degrees. Mix flour with baking powder and salt. Beat shortening (or margarine) with sugar; beat in egg yolks and vanilla.

Add flour mixture alternately with milk. Fold in beaten egg whites.

Fold in blueberries. Spread in pan and sprinkle with sugar.

Bake at 350 degrees for 35 to 45 minutes, until a toothpick inserted at center comes out free of batter.