This is a copycat of Burger King’s ChKing Deluxe — a hand-breaded fried chicken sandwich with a craggy, crunchy crust, fresh lettuce and tomato, and a tangy mayo sauce on a brioche bun. The honest reason to make it at home: you get noticeably better chicken than the original, because you control the oil temperature and the freshness of every ingredient. It takes about an hour start to finish, and most of that is hands-off brine time.
The short version of why this works
Two things carry this recipe. First, the buttermilk brine — even just 30 minutes in acidic buttermilk loosens the muscle fibers enough that the chicken stays juicy through high-heat frying, which would otherwise tighten and dry it out. Second, the cornstarch-and-baking-powder addition to the flour dredge. Cornstarch limits gluten formation so the crust fries up light and shatters cleanly instead of going chewy. The baking powder releases tiny gas bubbles during frying, which roughens the surface and creates those uneven, extra-crunchy bits. Neither trick requires any skill — you just mix them into the flour. Skip the egg in the dredge mix — it makes the coating dense and gummy instead of airy and crisp.
What can go wrong
- Oil temperature drops too far when you add the chicken. Cold chicken hitting hot oil pulls the temperature down fast. Let the chicken sit at room temperature for 10 minutes after brining, and fry one piece at a time if your pot is small. A thermometer is not optional here — guessing leads to either raw centers or burnt crusts.
- The coating slides off in the oil. This almost always means the chicken was too wet when it hit the flour. After pulling it from the buttermilk, let the excess drip off for a few seconds. A soaking-wet piece won’t grip the dredge properly.
- The crust is pale and soft, not golden and crispy. Pale crust means the oil was too cool. Soft crust after cooking usually means the chicken was placed on a flat plate where steam trapped underneath softened the bottom. Rest the cooked chicken on a wire rack, not paper towels or a plate.
- The chicken is cooked outside but raw at the center. This happens when the oil is too hot — the crust browns before the interior reaches a safe temperature. Use a meat thermometer and confirm the thickest part reads 165°F (74°C) before pulling it. If the crust is browning too fast, lower the heat slightly and give it more time.
- The brioche bun turns soggy before you finish eating. Toast the cut sides of the bun in a dry pan for 60–90 seconds until lightly golden. That thin toasted layer acts as a barrier and holds up against the sauce and tomato for much longer.
Crispy ChKing-Style Deluxe Chicken Burger
Ingredients
For the Buttermilk Brine:
- 4 pieces boneless, skinless chicken breasts (about 6 oz each), pounded to 1/2 inch thick choose air-chilled for best texture; even thickness ensures even frying
- 2 cups buttermilk full-fat preferred for richer tang
- 1 tablespoon hot sauce use your favorite; adds subtle heat and color
- 2 teaspoons kosher salt Diamond Crystal recommended; use a bit less if using Morton’s
- 1 teaspoon paprika sweet paprika for color; smoked will add a BBQ note
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
For the Deluxe Mayo Sauce:
- ½ cup mayonnaise full-fat for best mouthfeel
- 1 tablespoon Dijon mustard adds gentle heat and complexity
- 1 teaspoon fresh lemon juice brightens the sauce; bottled works in a pinch
- ½ teaspoon honey balances acidity; optional
- ¼ teaspoon freshly ground black pepper
For the Toppings & Buns:
- 4 whole brioche burger buns soft, slightly sweet; potato buns also work
- 2 tablespoons unsalted butter, softened for toasting buns
- 8 leaves green leaf or iceberg lettuce dry thoroughly for maximum crunch
- 8 slices ripe tomato about 2 medium tomatoes, sliced 1/4 inch thick
- ¼ teaspoon kosher salt for seasoning tomato slices
- ¼ teaspoon freshly ground black pepper for seasoning tomato slices
For the Seasoned Dredge & Frying:
- 2 cups all-purpose flour spoon and level for accuracy
- ⅓ cup cornstarch promotes extra-crispy, glassy crust
- 2 teaspoons kosher salt season the dredge generously
- 2 teaspoons paprika adds color and warmth
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1 teaspoon ground white pepper optional; black pepper works too
- ½ teaspoon baking powder encourages bubbly, craggy crust
- ½ cup buttermilk drizzled into dredge for extra cragginess
- 2 quarts peanut or canola oil for frying; use a deep, heavy pot and a thermometer
Instructions
- Prep and Brine the Chicken (10 minutes active + 30 minutes marinating): Pound each chicken breast to an even 1/2 inch thickness. In a bowl, whisk buttermilk, hot sauce, kosher salt, paprika, garlic powder, and onion powder. Submerge chicken, cover, and marinate 30 minutes (up to 12 hours refrigerated for deeper seasoning).
- Make the Deluxe Mayo Sauce (5 minutes): Stir together mayonnaise, Dijon, lemon juice, honey, and black pepper until smooth. Cover and refrigerate.
- Prep the Toppings (10 minutes): Dry lettuce well. Slice tomatoes into 8 slices (about 1/4 inch thick). Season tomato slices lightly with the kosher salt and pepper to amplify their flavor without making them watery.
- Mix the Seasoned Dredge (3 minutes): Whisk together flour, cornstarch, kosher salt, paprika, garlic powder, onion powder, white pepper, and baking powder in a wide bowl. This blend delivers a light, crispy, well-seasoned crust.
- Heat the Oil (about 10 minutes): Pour 2 quarts oil into a heavy Dutch oven or deep skillet to a depth of 1 1/2–2 inches. Heat to 350°F (175°C) over medium-high heat; monitor with a thermometer. Aim to maintain 325–350°F (163–175°C) during frying.
- Double-Dredge for Cragginess (5 minutes, done as oil heats): Lift a breast from the brine, let excess drip, then press into the flour mixture. Toss to coat, then drizzle 2–3 tablespoons of the remaining buttermilk over the dredge and mix with fingers to form small lumps. Press chicken back into these flour clumps for a rugged, extra-crispy surface. Repeat with remaining pieces. Rest coated chicken 5 minutes so the crust adheres.
- Fry the Chicken (about 12 minutes total in two batches): Carefully lower 2 breasts into the 350°F (175°C) oil. Fry 3–4 minutes per side until deep golden and the thickest part reads 165°F (74°C). Transfer to a rack and lightly season with a pinch of salt. Return oil to 350°F (175°C) and repeat with remaining 2 breasts (another 6–8 minutes). Total active frying time: about 12 minutes.
- Toast the Buns (2 minutes): Split buns and spread cut sides with softened butter. Toast cut-side down in a dry skillet over medium heat until golden, 1–2 minutes. Alternatively, warm in a 350°F (175°C) oven for about 3 minutes.
- Build the Deluxe Burger (3 minutes): Spread a spoonful of the mayo sauce on the bottom bun, add 2 lettuce leaves, then 2 tomato slices. Set a crispy chicken breast on top, add another spoon of sauce, and crown with the top bun. The heat of the chicken should lightly perfume the sandwich without wilting the lettuce.
Notes
Chef’s Tips:
- Cut Choice: Breasts deliver the classic profile, but boneless thighs stay even juicier. If using thighs, fry an extra 1–2 minutes and still target 165°F (74°C) internal.
- Ultra-Crispy Crust: Cornstarch and a touch of baking powder make the crust light and craggy. Drizzling buttermilk into the flour creates those coveted crunchy bits.
- Oil Management: Keep the oil between 325–350°F (163–175°C). If the temp drops below 325°F (163°C), the crust absorbs oil; above 350°F (175°C), it darkens before the meat cooks through.
- Season at Every Stage: Lightly salt the tomatoes and the fried chicken as it comes out of the oil to sharpen flavors.
- Sauce Variations: Add a pinch of cayenne or smoked paprika for heat; swap lemon juice for pickle brine for a tang reminiscent of fast-food classics.
- Dietary Adaptations: For gluten-free, use a 1:1 gluten-free flour blend and cornstarch; ensure buns are gluten-free. For dairy-free, use plant-based “buttermilk” (oat milk + 1 tablespoon vinegar per cup) and dairy-free buns/mayo.
- Alternative Cooking: Air fryer at 375°F (190°C) for 12–16 minutes, flipping halfway and misting with oil; oven-bake on a wire rack at 425°F (220°C) for 18–22 minutes, spraying lightly with oil for color.
- Optional Garnishes: Though the deluxe style leans lettuce-tomato-mayo, you can add thin dill pickle chips for a briny pop.
Nutrition
Common questions
Can I use chicken thighs instead of a breast?
Yes, and boneless skinless thighs actually work better for beginners — they’re harder to overcook and stay juicier. Pound them lightly to an even thickness so they fry in roughly the same time, and still check for 165°F (74°C) internal temperature before serving.
What oil should I use for frying?
Use a neutral oil with a high smoke point — vegetable, canola, or peanut oil all work well. Avoid olive oil or butter; they burn at the temperatures needed for crispy fried chicken and will give the coating a bitter, acrid flavor.
Can I make this in an air fryer instead of deep frying?
You can, but the crust will be noticeably less craggy and crunchy than the deep-fried version. If you go that route, spray the coated chicken generously with cooking oil before air frying at 400°F (200°C) for about 18–20 minutes, flipping halfway, and confirm 165°F (74°C) internal temperature.
How do I know when the oil is hot enough without a thermometer?
Drop a small pinch of the flour dredge into the oil — it should sizzle immediately and float to the surface within a second or two. That said, a cheap instant-read or clip-on thermometer is worth buying; guessing oil temperature is the single most common reason home-fried chicken comes out wrong.
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