Stir mayonnaise and Thousand Island dressing together in a small bowl. Set spread aside.
Place bacon in a large skillet and cook over medium-high heat, turning occasionally, until crisp, 8 to 10 minutes. Transfer to a paper towel-lined plate to drain.
Form ground chuck into 3 equal-sized patties. Use a small glass to cut out the center of each patty to create a donut-shaped burger. Combine excess meat to form a fourth donut-shaped burger. Season generously with salt and pepper.
Heat a cast iron skillet over medium-high heat. Add butter and melt. Add burgers and cook for 2 minutes per side. Crack an egg into the center of each burger. Cover the skillet and cook until whites are set, 4 to 5 minutes.
Place spread on the split sides of the bottom hamburger buns. Build each burger by topping with lettuce, a burger, 2 slices bacon, 1 slice Cheddar cheese, and a top bun.
Nutritional Facts
Per 4 servings
Calories: 656
Carbohydrate: 24g
Fat: 44g
Fiber: 1g
Protein: 40g
Sugar: 5g
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