In a bowl, mash the ripe avocados to your preferred texture. Add mayonnaise, cilantro, lime juice, garlic, salt, and pepper. Stir until well combined and set aside.
2 ripe avocados, 3 tablespoons mayonnaise, ¼ cup chopped fresh cilantro, 1 tablespoon fresh lime juice, 1 teaspoon minced fresh garlic, ¼ teaspoon kosher salt, ⅛ teaspoon freshly ground black pepper
Divide the ground beef into 4 equal portions and shape them into ½-inch patties. Gently flatten them to maintain their texture and do not overwork the meat. Season with salt and black pepper.
1 pound ground beef, Kosher salt and freshly ground black pepper
Preheat the oven to 200°F.
Preheat a grill pan over high heat and lightly oil it. Season one side of the burger patties with salt and pepper. Place the seasoned side down into the pan, ensuring a light press for optimal contact and caramelization. Cook for approximately 2 minutes until the edges turn grey. Season the top side with salt and pepper, then flip.
Continue cooking for another 2 minutes until the internal temperature reaches 165°F. Transfer the patties to a heat-proof plate and place them in the oven, turning off the heat. Cheese can be added to the patties in the oven or later.
In the same pan, lightly toast the burger buns.
4 hamburger buns
Spread a generous amount of the avocado smash on the bottom half of each toasted bun. Place a lettuce leaf on top of the smash, followed by a burger patty with cheese. Add a slice of tomato, a few slices of red onion, and cooked bacon strips. Top with additional avocado slices. Complete the burger with the top half of the toasted bun.
4 leaves lettuce, 4 slices cheese, 1 beefsteak tomato, 1 red onion, 8 strips cooked bacon, 2 ripe avocados