Smashburger is celebrating National Keto Day by offering a free Double Truffle Burger with the purchase of any Double Burger on January 5, 2021.
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