Instructions
Step 1. Preheat a skillet or flat-top griddle over medium-high heat.
/n Step 2. Cook the French fries according to package instructions until crispy and golden.
/n Step 3. Heat butter in a skillet and sauté the diced onions for 5–7 minutes until soft and lightly caramelized.
/n Step 4. Divide the ground beef into four loose balls without overworking the meat.
/n Step 5. Place the beef balls onto the hot griddle and smash them firmly with a spatula to form thin patties.
/n Step 6. Season the patties with salt, pepper, and garlic powder and cook for about 2–3 minutes until crispy around the edges.
/n Step 7. Flip the patties and immediately place a slice of American cheese on top, cooking for another 1–2 minutes.
/n Step 8. Lightly toast the brioche buns on the griddle until golden.
/n Step 9. Mix mayonnaise, ketchup, mustard, and pickle juice in a small bowl to create the burger sauce.
/n Step 10. Spread the sauce on the bottom bun, place the smashed patty on top, add sautéed onions and a handful of fries, then close with the top bun and serve immediately.
Storage and Reheating Tips
Store leftover burger patties in an airtight container in the refrigerator for up to 3 days. Reheat the patties in a skillet over medium heat to restore the crispy edges. Fries are best eaten fresh, but they can be reheated in an oven or air fryer at 375°F (190°C) for 5–7 minutes to regain crispiness. Assemble the burger fresh after reheating for the best taste and texture.
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