Melt In Your Mouth Blueberry Cake

" This is a nice tender cake -
It is a great cake to take along to a picnic. "

ngredients
1/2 cup butter
1/2 cup white sugar
1/4 teaspoon salt 
1 teaspoon vanilla extract 
2 egg yolks
1 1/2 cups all-purpose flour 
1 teaspoon baking powder
1/3 cup milk
2 egg whites 
1/4 cup white sugar 
1 1/2 cups fresh blueberries
1 tablespoon all-purpose flour 
1 tablespoon white sugar
Directions
1. Preheat oven to 350 degrees F (175 degrees C).
Grease and flour an 8 inch square pan.
2. Cream butter or margarine and
1/2 cup sugar until fluffy.
Add salt and vanilla.
Separate eggs and reserve the whites.
Add egg yolks to the sugar mixture;
beat until creamy.
3. Combine 1 1/2 cups flour and baking powder;
add alterately with milk to egg yolk mixture.
Coat berries with 1 tablespoon flour and add to batter.
4. In a separate bowl, beat whites until soft peaks form.
Add 1/4 cup of sugar, 1 tablespoon at a time, and beat until stiff peaks form. Fold egg whites into batter.
Pour into prepared pan.
Sprinkle top with remaining 1 tablespoon sugar.
5. Bake for 50 minutes, or until cake tests done.
Makes 1 - 8 inch square cake