sour cream , room temperature
2Prepare a 12-cup bundt pan with cooking spray and flour; set aside.
3In a mixing bowl combine cake mix and baking powder; set aside.
4In another mixing bowl, combine blueberries, sour cream, egg whites, oil and lemon peel.
5Mix dry ingredients with wet ingredients just until moistened.
6Pour batter into prepared pan; bake for 40 minutes.
7Serving Ideas : Serve warm or cool with powdered sugar or whipped cream.