2 c. flour
1 1/4 tsp. baking powder
1 tsp. baking soda
1/2 tsp. salt
1/2 c. butter
1 c. sugar
2 eggs
1 tsp. vanilla
1 c. sour cream
1 c. blueberries
1 tsp. lemon peel, grated (optional)

Cream butter and sugar until fluffy. Add eggs, one at a time. Beat well after each. Add vanilla. Sift dry ingredients together. Add dry ingredients alternately with sour cream. Mix just until smooth. Do not overmix. Add lemon peel, then blueberries. (Fold in gently.)

Fill cupcake papers and sprinkle with granulated sugar. Bake at 350 degrees for 30 to 40 minutes.