3 tbsp. butter
1/3 c. sugar
2 egg yolks
2/3 c. sifted flour
1 tsp. baking powder
1/4 tsp. salt
1/4 c. milk
1/4 tsp. vanilla

Cream butter and sugar, beat in egg yolks; add sifted dry ingredients alternately with milk and vanilla. Pour into 8 inch square pan. Bake at 350 degrees for 18 to 20 minutes.

TOPPING:

2 egg whites
1/4 tsp. salt
6 tbsp. sugar
1 c. fresh blueberries