$2 Challenge Butter Coupon **high value** This post may contain affiliate links. Please see the full disclosure policy here. Posted on March 1, 2012 Written by Mary Leave a Comment Hurry over & Grab your $2 Challenge Butter Coupon! This is a super high value coupon – not sure how long it will be available so don’t wait! Be sure to Go here to find out where Challenge Butter is sold to be sure it’s in your state.