There's a few Duncan Hines coupons you'll want to print to save at Giant Eagle starting Thursday! Duncan Hines Brownie Mix (19.27-19.95 oz.) or Frosting (12-16 oz.), $1.50 (starts 8/9/12) $0.35/1 Duncan Hines Product printable $0.55/1 Duncan Hines Brownie Mix printable $0.55/1 Duncan Hines Brownie Mix printable As low as $0.40 after doubled coupon! Duncan [...]