2 cans (21 oz. each) blueberry pie filling
1/2 c. butter, softened
1 pkg. (20 oz.) white cake deluxe mix
1 egg

In 13 x 9 inch baking pan, spread pie filling. In large mixer bowl, cream butter. Add dry ingredients and egg, blend well. Spoon over pie filling. Bake at 350 degrees for 40 minutes or until golden brown. Cut into 12 - 3 inch squares.