Cream sugar & butter. Beat in all other ingredients; except blueberries. Fold in blueberries. Line 9x13" pan or 2 (8") pans with waxed paper. Pour batter into pan & bake at 350 for 40 minutes, then increase to 375 for 10 minutes to brown top. Makes 1 (9x13") or 2 (8") square cakes.