Ingredients
2 cups all-purpose flour3/4 cup sugar1 teaspoon baking powder1/2 teaspoon salt1/4 teaspoon baking soda1 large egg1 cup reduced-fat sour cream1/4 cup unsweetened applesauce3 tablespoons canola oil1 teaspoon vanilla extract1-1/2 cups fresh or frozen blueberriesTOPPING:1/4 cup packed brown sugar1/4 cup quick-cooking oats1/2 teaspoon ground cinnamon2 tablespoons cold butter
Preparation
In a large bowl, combine the flour, sugar, baking powder, salt and baking soda. In another bowl, combine the egg, sour cream, applesauce, oil and vanilla. Stir into dry ingredients just until moistened. Fold in blueberries. Pour into a 9-in. square baking pan coated with cooking spray.
For topping, in a bowl, combine the brown sugar, oats and cinnamon; cut in butter until mixture resembles coarse crumbs. Sprinkle over the batter. Bake at 350° for 40-45 minutes or until a toothpick inserted in the center comes out clean. Cool on a wire rack.