Blueberry Cake

1/2 cup shortening
1 cup sugar
2 eggs (separated)
1/2 cup milk
1 1/2 cup flour
1 tsp. vanilla
1 1/2 cup blueberries

Cream the shortening and butter together. Add the following ingredients alternately: well beaten egg yolks, milk, flour, and vanilla then mix well. Whip the egg whites until stiff then fold into the batter. Add in the blueberries after dusting them lightly with flour (to prevent them from sinking to the bottom). Pour the batter into a greased 9 inch baking dish and cook at 350 for 35-45 minutes. Sprinkle with sugar when cooled.