Smashburger is celebrating National Keto Day by offering a free Double Truffle Burger with the purchase of any Double Burger on January 5, 2021.
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To take advantage of the offer, simply stop by any participating Smashburger location on Tuesday, and you’ll be able to score a free Double Truffle Mushroom Swiss Burger when you purchase any Double Burger on the menu.
The Keto-friendly Double Truffle Mushroom Swiss Burger features a pair of Certified Angus beef patties, aged Swiss cheese, sautéed crimini mushrooms, and truffle mayo on a toasted bun.
Smashburger’s National Keto Day deal is available at these participating locations for one day only on Tuesday, January 5, 2021.
Image – Smashburger