Instructions
Step 1 Divide the ground beef into two equal portions and loosely form them into balls.
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Step 2 Heat a cast iron skillet over high heat with olive oil until very hot.
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Step 3 Place the beef balls in the skillet and smash them flat with a spatula to form thin patties.
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Step 4 Season the patties with salt, black pepper, and garlic powder and cook for about 2 minutes until the edges become crispy.
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Step 5 Flip the patties and place a slice of cheddar cheese on each one, cooking another 1–2 minutes until melted.
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Step 6 In a small pan melt butter and sauté the sliced mushrooms until browned and tender.
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Step 7 In a bowl mix mayonnaise, ketchup, mustard, smoked paprika, and hot sauce to create the burger sauce.
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Step 8 Lightly toast the bun in a skillet until warm and golden.
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Step 9 Stack the cheesy smash patties on the bottom bun, top with sautéed mushrooms and drizzle generously with the burger sauce.
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Step 10 Finish with the top bun, sprinkle with parsley if desired, and serve immediately.
Storage and Reheating Tips
Store leftover burger components separately in airtight containers in the refrigerator for up to 2 days. Reheat the patties in a hot skillet for the best texture and toast the bun again before assembling. Mushrooms can be reheated quickly in a skillet until warm.
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