Winco currently has Challenge Butter (both salted and unsalted) for only $2.29 a box. Use this $0.55/1 coupon to score it for only $1.74 a box or this $0.50/1 coupon to get it for $1.79 a box!! Butter freezes great so this is an awesome price to stock up on it.
*There were also $0.75/1 coupons in the Smartsource 11/21 insert but it is regional. This coupon would make for even a better deal at only $1.54 for a box if you can get your hands on some.
** I am unsure how long this price will last on the butter.