1.In a large bowl, cream butter and sugar until light and fluffy. Beat in extracts. Add eggs, one at a time, beating well after each addition. Combine flour and baking soda; add to creamed mixture alternately with sour cream. Fold in blueberries.
2.Spoon into two greased and waxed paper-lined 9-in. x 5-in. loaf pans. Bake at 350° for 60-65 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pans to wire racks. Sprinkle with confectioners' sugar.
Editor's Note: If using frozen blueberries, use without thawing to avoid discoloring the batter.
**I halved this recipe and made 5 mini cakes. Baking time was around 35 minutes**