Blueberry sour cream muffins

I invented this recipe!

3/4 stick unsalted butter
5/8 cup sugar
1/4 cup sour cream
3 eggs, separated
1 teaspoon vanilla
1-1/4 teaspoon salt
3/4 teaspoon baking soda
1/4 teaspoon baking powder
2 cups flour
2 cups blueberries

Preheat to 350 degrees. Melt butter, use mixer and whip in the sugar, egg yolks, sour cream, salt, baking soda and baking powder. Beat egg whites stiff and fold into wet mixture along with flour. Add blueberries. Cook for about 15-20 minutes. Makes 18 muffins.