Smash Burgers

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  1 lbs 80/20 Ground Beef
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  4 tbsp Butter
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  4 Bread, Hamburger Bun, White(172g)
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  4 Lettuce, Iceberg(80g)
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  1 Tomato(123g)
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  0 Yellow Onion(28g)

Instructions

1. 1Divide the ground beef into four equal portions. Grate the frozen butter onto each portion, wrap the meat around it, and shape into balls. Refrigerate until ready to cook.
2. 2Place a cast iron skillet over high heat for 2–3 minutes until smoking hot. Season each beef ball with salt and pepper, then place one in the pan and immediately smash flat with a spatula, pressing firmly for 30 seconds. Keep the spatula on the patty and cook 2 minutes until the edges turn gray and the underside develops a golden-brown crust.
3. 3Carefully work the spatula under the patty to loosen it from the pan, then flip and smash again. Cook 2 minutes more until the second side is golden brown and the internal temperature reaches 160°F. Transfer to a cooling rack and repeat with remaining patties, wiping the pan between batches.
4. 4While the patties rest, position an oven rack in the upper third and preheat to broil. Slice the onion and tomato, and tear or chop the lettuce into bite-sized pieces. Set aside.
5. 5Melt the remaining butter and brush the inside of each bun with it. Place them buttered side up on a sheet pan and broil for 1–2 minutes until golden brown, watching carefully to prevent charring.
6. 6Place each cooked patty on the bottom bun and top with onion rounds, tomato slices, and lettuce. Cap with the top bun.