The Oklahoma cheeseburger only has one special ingredient: onions. This particular burger style isn’t new to aficionados,

but it’s becoming more common to see this on the menu at restaurants nationwide, and more how-to guides and recipes are showing up online.

On paper, the Oklahoma onion burger seems deceptively simple. But the way it cooks up is what makes this thing so special

thinly sliced onions are piled sky-high on top of a ball of beef—no joke, you add a mountain of them—and then, using a metal spatula,

you smash the onions down into the surface of the meat. As the beef cooks, the onions simultaneously cook into the meat,

imparting that delicious allium flavor throughout the whole patty. When the patty’s flipped, it’s then topped with cheese.

Pros place the top bun  on top of the patty and allow the steam from the onions to permeate the bread,

sometimes helping things along by draping the whole pile with a towel, and then once the meat’s done cooking, it’s good to go.