In a small bowl, combine blueberries and 2 tablespoons flour; set aside. In a large bowl, cream the butter, cream cheese, sugar and vanilla until light and fluffy. Add eggs and egg white, one at a time, beating well after each addition. Combine the baking soda, salt and remaining flour; add to creamed mixture alternately with yogurt. Fold in reserved blueberries.
Transfer to a 10-in. fluted tube pan coated with cooking spray. Bake at 350° for 65-70 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack. In a small bowl, whisk glaze ingredients until smooth. Drizzle over warm cake. Yield: 16 servings.