Cast Iron Ultimate Indoor Burgers
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WHY THIS RECIPE WORKS
The ultimate indoor burger should be a juicy patty with a crisp crust. Typically, for a great charred exterior we turn to the grill, but we knew our cast-iron skillet was up to the challenge. To control the texture and fat content of the be...
GATHER YOUR INGREDIENTS
BEFORE YOU BEGIN
Sirloin steak tips, also known as flap meat, can be sold as whole steaks, cubes, and strips. To ensure uniform pieces, we prefer to purchase whole steaks and cut them ourselves. While you'll get much better results with home-ground meat, it is possible to substitute 1 1/2 pounds 85 percent lean ground beef for the steak tips; skip steps 2 and 3 and proceed with the recipe as directed.
FOR THE SAUCE: Whisk all ingredients together in bowl; refrigerate until ready to serve.
FOR THE BURGERS: Place beef pieces in rimmed baking sheet in single layer. Freeze until meat is very firm and starting to harden around edges but still pliable, about 35 minutes.
Working with one-quarter of meat at a time, pulse in food processor until finely ground into rice grain–size pieces (about 1/16 inch), 15 to 20 pulses, stopping and redistributing meat around bowl as necessary to ensure that beef is evenly ground. Transfer meat to sheet and inspect carefully, discarding any long strands of gristle or large chunks of hard meat or fat. Drizzle with melted butter and sprinkle with 1 teaspoon pepper and 3/4 teaspoon salt. Gently toss meat with fork to combine.
Divide meat into 4 balls. Toss each between your hands until uniformly but lightly packed, then gently flatten into 1-inch-thick patties. Cover patties and refrigerate for at least 30 minutes or up to 24 hours.
While patties chill, adjust oven rack to middle position, place 12-inch cast-iron skillet on rack, and heat oven to 500 degrees. Season 1 side of patties with salt and pepper, then, using spatula, flip patties and season second side.
When oven reaches 500 degrees, remove skillet from oven using potholders and place over medium-high heat; turn off oven. Being careful of hot skillet handle, add oil and heat until just smoking. Cook patties until well browned on first side, about 3 minutes.
Flip burgers and continue to cook until well browned on second side and burgers register 120 to 125 degrees (for medium-rare), about 3 minutes. Transfer burgers to plate and let rest for 5 minutes. Serve burgers with buns and sauce.