1/2 c. butter, softened
1 1/4 c. sugar
2 eggs
1 c. sour cream
1 tsp. vanilla
2 c. flour, sifted
1 tsp. baking powder
1/2 tsp. baking soda
1/2 c. blueberries

Cream butter and sugar. Add eggs and beat until smooth. Mix in sour cream and vanilla. Combine flour, baking powder and baking soda. Stir dry ingredients into creamed mixture. Fold in berries. Spoon into muffin tins filling 1/2 full. Bake at 400 degrees for 25 to 30 minutes. When cooled, dust with powdered sugar.