Double Stacked Delight Burger with Creamy Secret Spread

In a small bowl, mix the mayonnaise, greek yogurt, ketchup, and sweet pickle relish. Cover and chill until ready to serve.

In a large bowl, season the ground beef with garlic powder, salt, and freshly ground black pepper. Mix with your hands, being careful not to overwork the meat.

Divide the beef mixture into 8 equal portions and form each portion into a thin, evenly sized patty.

In a large cast iron skillet, heat extra virgin olive oil over medium-high heat. Add the finely chopped white onion and cook, stirring frequently, until softened and golden brown, about 8 to 10 minutes. Add a tablespoon of water to the skillet if the onions begin to burn. Transfer the onion to a bowl.

Return the skillet to medium-high heat. Add 4 of the patties and cook until well-browned on one side, about 3 minutes. Flip the patties, top each one with a slice of Cheddar cheese, and cook for another 3 minutes until the cheese is melted. Transfer the patties to a plate.

Cook the remaining 4 patties in the skillet, browning them for about 3 minutes per side.

Spread the secret spread on the tops and bottoms of the toasted hamburger buns.

Place one cheese-topped patty on the bottom half of each bun. Divide the cooked onions evenly among the patties. Place another patty on top of the onions, and then top with a slice of tomato and a generous portion of shredded iceberg lettuce.

Cover each burger with the top half of the bun and serve.