Smash Burgers

1 . Stage

Stir ketchup, mayonnaise, pickle relish, vinegar, white sugar, and garlic together in a small bowl. Season to taste with salt and black pepper; cover and set aside,

2 . Stage

Divide ground beef into 4 even pieces. Roll each piece into a ball; refrigerate until needed. Spread cut sides of each hamburger bun with butter.

3 . Stage

Heat a large cast iron or nonstick skillet over medium-high heat (you can add a little vegetable oil if worried about sticking).

4 . Stage

Add two hamburger balls to the skillet. Smash meat flat using the bottom of a small sauce pot or a spatula. Hold in place until seared, about 1 minute; season with salt and pepper. Cook until a good crust forms, then flip.

5 . Stage

Once the flip side looks close to being done, cover with cheese slice. Move the patties aside and place buns, butter side down, in skillet until toasted. Continue to cook burgers until cheese is melted, meat is no longer pink in the center, about 5 minutes. An instant-read thermometer inserted into the center should read at least 160 degrees F (70 degrees C).

6 . Stage

Remove buns to a plate; top each bottom bun with a patty. Spread toasted side of top bun with some of the special sauce.

7 . Stage

Lay a few onions down on the patty, cover with the top bun and enjoy!