How to cook a burger on a cast iron skillet?

To cook a burger on a cast iron skillet, preheat the skillet over medium-high heat. Season the burger with salt and pepper, then place it in the skillet. Cook for about 4-5 minutes on each side, or until desired level of doneness is reached. Make sure to flip the burger only once to ensure a nice crust forms. Serve on a bun with your favorite toppings.