- 1/4 teaspoon canola oil
- 5 ounces freshly ground beef, divided into two 2 1/2-ounce balls
- Kosher salt and freshly ground black pepper
- 1 medium onion, thinly sliced (about 1 cup sliced onions)
- 2 slices American cheese
- 2 soft hamburger buns
- Mustard, pickles, and other condiments, if desired
With a paper towel, spread canola oil in a large cast-iron skillet.
Bring to a high temperature until it starts to smoke.
Add the beef balls and flatten them with the back of a spatula until they are all the same size.
Add salt and pepper in large amounts.
-Working quickly, spread onions evenly over burgers that are cooking and press down to embed onions in meat.
Let the burgers cook for about 2 minutes without pressing on them.
-Flip the burgers carefully with a stiff spatula, making sure to pick up all of the browned meat from the pan.
Let the onions cook for about a minute, or until they start to soften.
Add cheese, then put the top bun on.
Put the bottom bun on top of the top bun upside down so it can steam in the onion vapors.
-Place the bottom buns on a plate when they're soft.
You can add condiments if you want.
Together, pick up the onions, burger, and top bun and put them on the bottom bun.
Do the same for the second burger.
Serve straight away.