Oklahoma Fried Onion Smash Burger

Ingredients

• 1 lb (450 g) ground beef (80/20 chuck recommended—fat is flavor and crust)
• 1 large yellow or sweet onion (Vidalia if in season)
• 2 slices American cheese
• 2 burger buns (potato or brioche), split
• 2 tbsp unsalted butter, softened (for buns)
• Kosher salt and coarse black pepper
• 1 tsp vegetable oil (for the griddle)

• Pickle slices
• Yellow mustard
• Mayonnaise
• Thin tomato slices

Instructions

Step 1: Prep the Onions (5 minutes | Intensity: Low)

1. Peel the onion and slice it paper-thin using a mandoline or sharp knife. You want translucent shavings, not chunks—they need to melt and crisp simultaneously. Set aside. Do not soak in water; you want the natural sugars and starch for caramelization.

Step 2: Portion and Shape the Beef (5 minutes | Intensity: Low)

1. Divide the beef into 2 equal balls (about 8 oz / 225 g each). Do not overwork or compact them. Gently form loose balls—they should barely hold together. This loose structure is what allows the smash to spread and create maximum crust surface. Season the balls lightly with salt and pepper on top only.

Step 3: Prep the Buns (3 minutes | Intensity: Low)

1. Butter the cut sides of the buns. Toast them cut-side down in a dry skillet over medium heat (Level 5 of 10) for 60–90 seconds until golden. Set aside on a plate.

Step 4: Heat the Griddle (5 minutes | Intensity: Medium)

1. Place your cast-iron skillet or griddle over medium-high heat (Level 7 of 10) . Let it preheat a full 4–5 minutes—this is non-negotiable for crust development. Add the teaspoon of oil and swirl. A drop of water should sizzle and evaporate instantly. Intensity note: The pan must be hot but not smoking; smoking means burnt onions before the beef cooks.

Step 5: The Onion Bed (1 minute | Intensity: High)

1. Place a generous handful of sliced onions (about ¼ cup, loosely packed) directly on the hot griddle in a circle roughly the size of your bun. Spread them into an even, thin layer. Intensity: High—work fast. The onions begin releasing moisture immediately.

Step 6: The Smash (30 seconds | Intensity: High)

1. Place one beef ball directly on top of the onion pile. Using your sturdy spatula (press with a second spatula or your palm for leverage), smash firmly and evenly to about ¼-inch thickness. Hold pressure for 10 full seconds—this is where the magic bond forms. Repeat with the second patty. Intensity: High—commit to the press. A timid smash means a crumbly, dry burger.

Step 7: The Sear (2 minutes | Intensity: Medium-High)

1. Do not touch the patties. Let them sear undisturbed for 2 minutes at Level 7. You’ll see the edges darken and the onions around the perimeter turn deep golden brown. Season the raw top side lightly with salt and pepper.

Step 8: The Flip (30 seconds | Intensity: High)

1. Slide your spatula firmly under the onion side —this is the crispy layer you must protect. Flip in one confident motion. The onion crust should now be face-up and lacquered golden. Intensity: High—hesitation tears the crust.

Step 9: Cheese and Finish (60–90 seconds | Intensity: Medium)

1. Immediately lay a slice of American cheese on each patty. Cook for 60–90 seconds until the cheese melts fully and the beef reaches 160°F (71°C) internally. Intensity: Medium—watch closely; the second side cooks fast.

Step 10: Rest and Assemble (5 minutes | Intensity: Low)

1. Transfer patties to a plate and rest 2–3 minutes (cheese keeps melting). Meanwhile, spread mayo and mustard on the bun bottoms. Add pickles. Slide the patty—onion crust down—onto the bun. Top with tomato if using, then the bun top. Press gently. Rest the assembled burger 2 minutes so juices redistribute.

Nutrition

Calories: ~720 kcal · Protein: 38 g · Fat: 48 g (18 g saturated) · Carbohydrates: 34 g (2 g · Fiber: , 6 g · Sugar: ) · Sodium: 890 mg