This is a homage to Burger King’s Halloumi King Burger — two thick slabs of halloumi, flour-dredged and pan-fried until golden, stacked on a sesame brioche bun with a smoky harissa-lemon mayo and quick-pickled red onions. It comes together in 30 minutes and makes a genuinely satisfying burger that doesn’t need meat to back it up.
Why this recipe works
Two things make or break a halloumi burger: the dredge and the heat. A light coating of flour — with smoked paprika mixed in — gives the cheese a crust that crisps fast and stops it from welding itself to the pan. That crust also holds up under toppings instead of turning slippery. The second thing is a properly hot pan before the halloumi goes in. If the pan isn’t hot enough, the cheese steams instead of sears, and you lose the golden exterior that makes the whole burger worth eating. Get those two right and everything else falls into place.
If something goes sideways
- Halloumi sticking to the pan: The pan wasn’t hot enough or the oil wasn’t shimmering before you added the cheese. Pull it off heat, let the pan recover for 30 seconds, add a touch more oil, and try again — halloumi releases naturally once the crust sets.
- Cheese turns rubbery instead of golden: It cooked too long over low heat. Halloumi needs high heat and a short cook — about 2 minutes per side. Once it’s golden, get it off the pan immediately.
- Burger tastes overwhelmingly salty: Halloumi is brined, and some blocks are saltier than others. Pat the slices dry and give them a 10-minute soak in cold water before dredging if you’re working with a particularly salty block.
- Buns going soggy before you serve: Spread the mayo on both cut sides and toast the buns cut-side down in the same pan after the halloumi comes out. That thin layer of fat creates a barrier that slows soaking, which matters a lot when you’re plating multiple burgers at once.
- Dredge clumping or falling off: Make sure the halloumi slices are completely dry before flouring. Any surface moisture turns the dredge into a paste that slides off in the pan.
Make-ahead notes
The pickled onions are the easiest win here — make them up to 5 days ahead and keep them in a sealed jar in the fridge; they actually improve after 24 hours. The harissa mayo holds for 3 days refrigerated in a covered container. Halloumi itself doesn’t reheat well once cooked — it goes from squeaky to tough — so plan to fry it fresh. If you’re cooking for a group, you can dredge all the slices up to an hour ahead and keep them on a plate in the fridge, uncovered, so the flour coating dries out slightly; this actually helps them sear more evenly when they hit the pan. Skip the egg in the dredge mix — it makes the coating gummy and causes more sticking, not less.
Burger King Halloumi King Burger — Chef’s Homage
Ingredients
For the Quick Pickled Red Onions (optional, recommended):
- ½ small red onion, thinly sliced aim for paper-thin half-moons for best texture
- ½ cup hot water hot tap water to help dissolve sugar and salt
- ¼ cup apple cider vinegar white vinegar also works
- 1 teaspoon granulated sugar
- ½ teaspoon kosher salt
For the Smoky Harissa-Lemon Mayo:
- ⅓ cup mayonnaise use a full-fat, good-quality brand
- 1 teaspoon harissa paste adjust to heat preference; mild to hot
- 1 teaspoon fresh lemon juice brightens and balances the richness
- ½ teaspoon finely grated lemon zest
- 1 clove garlic, finely grated microplane for a smooth, mellow paste
- ¼ teaspoon honey balances harissa heat
- 1 pinch kosher salt to taste
For the Halloumi King Burger:
- 8 oz halloumi cheese cut into four 1/2-inch-thick slabs; choose firm, high-quality halloumi
- ¼ cup all-purpose flour for light dredging; helps crisp edges and prevents sticking
- ½ teaspoon smoked paprika adds a subtle smoky depth
- ¼ teaspoon freshly ground black pepper
- ⅓ cup neutral oil (canola or grapeseed) for shallow-frying; high smoke point preferred
- 2 whole sesame brioche buns fresh and soft; split
- 2 leaves butter lettuce or romaine crisp, dry leaves for snap
- 4 slices ripe tomato thick-cut, lightly salted
- 2 tablespoons sweet chili sauce for a classic fast-food-style glaze; optional
- 3 tablespoons Smoky Harissa-Lemon Mayo from above; adjust to taste
Instructions
- Quick-Pickle the Onions (Prep, 10 minutes): In a small bowl, stir together hot water, apple cider vinegar, sugar, and salt until dissolved. Add the sliced red onion, press to submerge, and let sit at least 10 minutes while you make the sauce and prep the halloumi. They should turn vivid pink and smell bright and tangy.
- Make the Smoky Harissa-Lemon Mayo (Prep, 5 minutes): Whisk mayonnaise, harissa, lemon juice, lemon zest, garlic, honey, and a pinch of salt until smooth and salmon-pink. Taste and adjust heat with more harissa or balance with a touch more honey. Chill until needed.
- Prep the Halloumi (Prep, 5 minutes): Pat halloumi slabs very dry with paper towels (crucial for crisping). In a shallow dish, mix flour, smoked paprika, and black pepper. Lightly dredge each halloumi piece, shaking off excess flour; you should see a thin, even coat.
- Heat the Oil (Cook): Add about 1/3 cup neutral oil to a 10-inch skillet and heat over medium to medium-high until shimmering and a thermometer reads about 350°F (175°C). Without a thermometer, a wooden spoon tip should bubble steadily on contact, and a pinch of flour should sizzle instantly.
- Fry the Halloumi (Cook, 5–6 minutes): Lay the dredged halloumi in the hot oil; it should sizzle on contact. Fry until the edges turn deep golden and the surface looks lightly blistered, 2–3 minutes. Flip and cook 1–2 minutes more until evenly golden. Transfer to a rack or paper towel. For holding, keep warm in a 200°F (95°C) oven while you toast the buns.
- Toast the Buns (Cook, 1 minute): Wipe out the skillet, leaving a thin sheen of oil. Toast buns cut-side down over medium heat until golden, 30–60 seconds. The aroma should be nutty and the surface lightly crisp.
- Assemble (Cook, 3 minutes): Spread about 1 tablespoon Smoky Harissa-Lemon Mayo on each bottom bun. Layer lettuce and tomato (lightly season with a pinch of salt). Add two halloumi slabs per burger. Drizzle each with about 1 tablespoon sweet chili sauce for a glossy, sweet-heat finish, then top with drained pickled onions. Cap with the bun and press gently to set.
- Serve: The exterior should be audibly crisp, the interior squeaky-tender, and the bun warm and fragrant. Eat immediately while the halloumi is at peak texture.
Notes
Chef’s Tips:
- Keep it Crisp: Halloumi loves moisture—pat it very dry and use a light dredge to prevent sticking and boost crunch.
- Grill Alternative: Brush slices lightly with oil and grill over well-oiled grates at about 450°F (230°C) for 2–3 minutes per side.
- Air-Fryer Method: Lightly spray dredged halloumi; air-fry at 400°F (205°C) for 6–8 minutes, flipping halfway, until golden.
- Heat Control: Adjust harissa in the mayo to taste. For extra kick, add a pinch of cayenne to the dredge.
- Vegan Swap: Use a plant-based halloumi-style cheese and vegan mayo; keep the same method.
- Extra Crunch: For a thicker crust, dip halloumi in beaten egg then panko; fry as directed.
- Bun Choice: Brioche gives plush sweetness; potato buns are a sturdier, less sweet alternative.
Nutrition
Your questions, answered
Can I grill the halloumi instead of pan-frying it?
Yes, a grill works well for halloumi. Make sure the grates are clean and well-oiled, and use high direct heat — the same principle applies as the pan: hot surface, short cook time, and the flour dredge still helps prevent sticking and adds texture.
How do I keep the halloumi warm if I’m making multiple burgers?
Set your oven to 200°F (93°C) and place cooked slices on a wire rack over a baking sheet — this keeps them warm for up to 15 minutes without steaming them soft. Avoid stacking the slices or covering them with foil, which traps moisture and softens the crust.
Is there a substitute for the brioche bun?
A standard sesame burger bun works fine. The main thing you want is a bun that can be toasted until it has some structure, since halloumi and mayo together are heavy enough to collapse a soft bun quickly.