Homemade Big Mac

INGREDIENTS :

BIG MAC SAUCE
1/3 cup mayonnaise
4 tablespoons pickle relish, drained
3 tablespoons ketchup
1 teaspoon sugar
1 teaspoon white vinegar
FOR ASSEMBLY
8 hamburger buns, plus additional bottom buns for the middle bun
1/4 cup unsalted butter, softened
1 white onion, diced
dill pickle chips
shredded iceberg lettuce
PATTIES
2 pounds 80/20 ground beef
salt, to taste
black pepper, to taste
1 tablespoon butter, split in half
1 tablespoon vegetable oil, split in half
1/4 cup yellow mustard
8 slices American Cheese

DIRECTIONS:

MAKE THE SPREAD
In a small bowl, mix together the mayonnaise, relish, ketchup, sugar, and vinegar. Set aside.
PREPARE THE PATTIES
Weigh out 8 portions of 3.5 oz of ground beef or eye it out. Gently flatten the patty into a circle to desired thin or thickness, making sure to not mix or mold it too much. Sprinkle with salt and pepper on both sides. Set aside.
TOAST THE BUNS
Brush the insides of the buns with butter.
Heat a pan or skillet over medium heat. Lay the buns butter side face down. Take them off the pan when a nice golden brown develops around the edges …