Blueberry Graham Cake

1/2 Cup butter or margarine

1 Cup sugar

3 eggs

3/4 Cup milk

1 Pint blueberries

1 Cup all-purpose flour

1 1/2 Cups graham cracker crumbs

1 Teaspoon baking powder

1 Teaspoon baking soda

garnish: additional blueberries whipped cream Cream butter and beat in sugar. Beat in eggs, one at a time. Stir in milk. Combine blueberries, graham cracker crumbs, flour, baking powder and baking soda. Add all at once to egg mixture and beat until smooth. Pour into a greased 8 inch spring form baking pan. Bake in a preheated 375 degree oven for 50 to 60 minutes, or until top is richly browned. Arrange blueberries over top of cake and garnish with a dollop of whipped cream.