Shake Shack is giving away free burgers today -- here's how to get one

Shake ShackMarina Nazario/Business InsiderIt’s National Cheeseburger Day.

Shake Shack is giving away free burgers.

On Monday, the burger chain is delivering free Shack Burgers via DoorDash from 11 a.m. to 2 p.m. local time. Customers can claim their free burgers by entering “SHACK” as a promo code on checkout.

The free burgers are a culmination of “Shack Week,” during which DoorDash has been offering free Shake Shack delivery on all orders over $US12.

With National Cheeseburger Day taking place on Monday, Shake Shack isn’t the only chain with burger deals.

Applebee’s is selling all burgers for $US6.99, and BurgerFi is cutting its cheeseburger price to $US5 from $US7. Plus, Fuddrucker’s has a challenge for diners: if you can finish a three-pound burger and a one-pound order of fries, you get a $US20 gift card and congratulatory t-shirt.

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