Delta Juke Burger
1 cup mayonnaise
2 tablespoons ketchup
1 tablespoon yellow mustard
1-1/2 teaspoons Ultimate BBQ Rub
2 pounds (80/20) ground beef
2 tablespoons Grill seasoning
4 slices cheddar cheese
1 yellow onion, sliced crosswise into rounds
4 hamburger buns
Lettuce, tomato slices, and pickles for serving
Preheat a cast-iron skillet or griddle over medium heat.
To make the sauce, combine the mayonnaise, ketchup, mustard, and rub in a small mixing bowl and mix well. Set aside. The sauce can be covered and refrigerated for up to one week.
Form the ground beef into eight balls. Flatten slightly, but don’t make into patties. Season both sides of the balls with the grill seasoning, then place in the skillet. Using a metal spatula, flatten into thin patties. Sear for 2 minutes or until the patties release from the skillet. Flip and cook for 2 minutes longer for medium.
Top every other patty with a slice of cheese and then another patty to make double-deckers. Remove the patties from the skillet and place the onion slices in the skillet to sear for 2 minutes. Place 1-1/2 teaspoons of the juke sauce on the bottom of each bun; dress with lettuce, tomato slices, and pickles; then finish with a slice of seared onion and a set of patties and the top bun.