Cream first 2 ingredients together. Add eggs. Sift flour, baking powder and salt together, and add alternately with milk. Stir in berries. Spread into a well-buttered 9x12-inch pan. Blend the last 4 ingredients, and sprinkle on top. Bake at 375 degrees 25 to 30 minutes. Frozen berries (*) may be used. Be sure to rinse and pat dry before blending them into the batter...or the juice will turn the batter blue. (Most of a dozen oz. bag makes 2 cups.)