Ingredients
Equipment
Method

- Divide the ground beef into four equal portions and gently form 1/2-inch-thick patties. Season both sides with salt and pepper, and press a small indentation into the center of each to prevent bulging during cooking.
- Melt 2 tablespoons of butter in a large skillet over medium heat. Add the sliced onions and cook, stirring occasionally, until golden and caramelized—about 8 to 10 minutes. Remove and set aside.
- Wipe the skillet clean, return to medium-high heat, and add 1 tablespoon butter. Sear the patties for 3–4 minutes per side, or until desired doneness. Place a slice of cheese on each patty during the last minute to melt.
- Melt the remaining butter and toast sourdough slices until golden on both sides. Keep warm.
- Assemble each sandwich by placing a cheesy patty on a slice of toast, topping with caramelized onions, and adding a second slice of cheese before closing with the second bread slice.
- Return sandwiches to the skillet over medium-low heat. Press lightly with a spatula and cook 2–3 minutes per side until the cheese is fully melted and bread is crisp and golden.
Nutrition
Calories: 480 | Carbohydrates: 29 | Protein: 28 | Fat: 27 | Fiber: 2 | Sugar: 5
Notes
STORAGE: Store cooled components separately. Patties and onions keep refrigerated for up to 3 days. Assembled sandwiches are best eaten fresh.
MAKE AHEAD: Form patties and caramelize onions up to 2 days in advance for faster assembly.
SUBSTITUTIONS: Use low-fat cheese, whole grain bread, or olive oil to reduce calories. Plant-based crumbles or turkey substitute well for beef.
PRO TIPS: Toast bread with mayonnaise for extra golden color and richness; cover skillet briefly to melt cheese fully.
SERVING SUGGESTIONS: Serve with dill pickles, french fries, or a simple green salad for a balanced meal.
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