Step 1

Separate the ground beef into four equal portions.

Step 2

Grate 1/2 tablespoon of frozen butter onto each portion. Wrap the meat around the butter and shape it into a ball. Chill the beef until you are ready to cook. Place an ungreased cast iron skillet over high heat. Turn on your exhaust fan. Open a window.

Step 3

When the skillet is smoking hot, sprinkle a 3/4 teaspoon of burger seasoning all over the beef ball, then place it in the pan.

Step 4

Smash down with a spatula and keep the spatula on the burger as it cooks. When you see the top of the patty change color (about 2 minutes), carefully work the spatula under the patty. Take your time with this step, as the patty will be stuck to the pan.*

Step 5

When you have loosened the patty, flip it and smash it again. Cook for 2 minutes more, remove the patty from the pan, and rest it on a cooling rack. Wipe the pan down with a paper towel and cook the remaining patties.

Step 6

While the patties rest, place a rack in the top third of your oven and put it on broil. Melt the remaining 2 tablespoons of butter and brush it onto the inside of the buns. Place them buttered side up on a sheet pan and toast in the oven for a few minutes until golden.

Step 7

Assemble the burgers. Place the burger on the bottom bun and top with onion rounds, tomato slices, and lettuce. Add the top bun and enjoy the crispiest, smokiest, burger ever!