Smashburger Coupon for Buy One Entree Get One Free 3 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 Wish Bone Dry Dressing & Seasoning Mix Coupon + Walmart Deal (Plus Recipe Idea) 2 years ago New 80% off Code to Restaurant.com 4 years ago Gerber Graduates Pasta Pick-Up Only 87 Cents at Walmart 4 years ago $10 off $50 at Old Navy (+ $10 jeans) 5 years ago Free Food: Fresh Taco from Taco Bell, Free Burger from Whataburger and More 6 years ago Printable Coupons: Pop Chips, Morton Season All, Edy’s Ice Cream + More 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.