Smashburger Coupon for Buy One Entree Get One Free 2 years ago 2 Comments Coupons, Restaurant Deals Smashburger has a great offer right now. Buy one Eentree get another one free with this printable coupon. Offer valid through 3/31/13. Find the Smashburger closest to you here. Facebook Prev Article Next Article You may also like New Famous Footwear 30% Off Coupon 2 years ago Walgreens: Kellogg’s Nutri-Grain Cereal Coupon and Deal Idea Starting 7/1 3 years ago Save $1 off Special Edition All You Magazine 4 years ago Paper Towels and Toilet Paper Just $.27 Per Roll at CVS 1 year ago Free Food: Jack in a Box and Steak’n Shake 6 years ago Lunch Meat Coupons: Sara Lee, Hillshire Farms and Oscar Mayer 5 years ago Sandy P Thanks for the coupon, I have never tried this place… a must for this weekend!! Lindsay Ackerman Guess they need to update their restaurant finder; there are at least 3 in my city and the ZIP code search is telling me my closest is St. Louis.