Combine first 3 ingredients; stir to blend. Pour batter into a greased 9 x 5 loaf pan; bake as directed on the package. Cool completely; cube. Combine pudding and milk, whisk 2 minutes; fold in whipped topping. Layer cake cubes, pudding mixture and berries in a clear glass bowl or individual trifle bowls. Cover; chill 1 hour. Garnish with additional berries. Serves 10-12.