Duncan Hines $.50 off brownie mix

Gotta love  Duncan Hines:  Even though it's hot outside, it's still fun to bake Duncan Hines brownies. Here's a coupon for 50 cents off. (USA only. Requires a printer.) http://coupons2.smartsource.co​m/smartsource/index.jsp?Link=P​U7PCGLH4OU32