Smashburger Offers $5 Double Classic Burger Deal On September 18, 2021

The brand’s Double Classic Burger features two 100 percent certified Angus beef patties, two slices of American cheese, lettuce, tomato, onion, pickles Smash Sauce and ketchup on a classic bun.

Smashburger’s National Cheeseburger Day deal is valid at participating locations nationwide for one day only on September 18, 2021.

National Cheeseburger Day is cel…

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