For a limited time, Smashburger adds the new French Onion Double along with the new Chameleon Cold-Brew Coffee Shake at participating locations,.

The French Onion Double features two beef patties topped with two slices of Swiss cheese, a double portion of garlic grilled onions and French onion dip on a toasted onion bun.

The Chameleon Cold-Brew Coffee Shake is milkshake made with Chameleon’s organic cold-brew coffee hand-spun with Häagen-Dazs ice cream and finished with a dollop of whipped cream.

Image – Smashburger