BIRMINGHAM, Ala. (WIAT) — It may be high time for restaurants to start paying attention to the cannabis crowd.

This Saturday, Carl’s Jr. will become the first major fast-food chain to sell a cannabis-infused burger.

The aptly-named Rocky Mountain High: Cheese Burger Delight (CBD) features two beef patties, pickled jalapenos, pepper jack cheese, waffle fries, and CBD-infused Santa Fe Sauce. The special sauce contains about five milligrams of hemp-derived CBD extract.

The chain’s new menu item will be tested at its Denver locations for one day only, April 20: the unoffiical holiday for cannabis-oriented celebrations.

Carl’s Jr. and its sister brand Hardee’s have 3,800 locations in 44 states.

The recent US farm bill legalized hemp, defined as cannabis with less than .3% THC. However, the FDA hasn’t yet approved it for use in food and beverages.