This is a copycat of Burger King’s teriyaki-glazed Whopper Jr — a smaller burger with a sweet-salty pineapple teriyaki glaze, glazed onions, iceberg, and tomato on a sesame bun. It takes about 44 minutes start to finish and uses ingredients you can find at any grocery store. If you want a fast-food-style burger with a little more flavor than the usual ketchup-and-mustard setup, this is a solid weeknight option.
The short version of why this works
Two things carry this recipe. First, the cornstarch in the glaze — it tightens the sauce so it clings to the patty instead of running off onto the grill. Without it, you get a wet patty and a soggy bun. Second, timing the glaze application matters: brush it on in the last minute or two of cooking so the sugars caramelize without burning. Hit the patty too early and you get a bitter, blackened crust instead of that glossy, lacquered finish. Get those two things right and everything else falls into place.
Mistakes to avoid
- Skipping the rest after glazing: Pull the patty off heat and let it sit for 60 seconds before building the burger. The glaze sets up and stops sliding around when you stack everything.
- Overcrowding the pan for the onions: If the onions are piled up, they steam instead of caramelize. Use a wide pan and give them room — or cook in two batches.
- Using cold patties straight from the fridge: A cold center means you cook the outside too long trying to hit 160°F internal. Let the patties sit at room temperature for 10 minutes before they hit the heat.
- Toasting the bun too early: Toast it right before assembly. A bun that sits toasted for five minutes goes from crisp to dry and starts crumbling under the saucy patty.
- Under-reducing the glaze: If the glaze looks thin in the pan, give it another minute. It should coat the back of a spoon before you use it. A thin glaze soaks into the bun and makes the whole thing fall apart.
Smart swaps
- Mirin: The recipe already notes the swap, but it’s worth repeating — if you skip it entirely without compensating, the glaze tastes flat. The extra pineapple juice plus a teaspoon of sugar is a real fix, not just a workaround.
- Pineapple juice: Canned 100% pineapple juice works fine. Avoid juice blends or anything with added sugar — the glaze is already sweet and you’ll lose the brightness that balances it.
- Fresh ginger: Ground ginger is not a 1-for-1 substitute here. Use a quarter teaspoon of ground ginger only if you have no other option — skip the egg in the mix — it makes the patty mushy — and keep the rest of the aromatics intact so the glaze still has some depth.
- Sesame bun: Any standard burger bun works. A brioche bun is a bit rich against the sweet glaze; a plain potato bun is the better backup.
Leftovers and meal prep
Cooked patties keep in the fridge for up to 3 days in an airtight container. Store the glaze separately — it keeps for a week in the fridge in a jar. Reheat the patty in a dry skillet over medium heat for 2 to 3 minutes per side, then brush on fresh glaze in the last minute. Microwaving works in a pinch but dries out the patty fast, so cover it with a damp paper towel and go in 30-second bursts. The glazed onions reheat well in the same skillet while the patty warms. For meal prep, make a double batch of glaze and freeze half in an ice cube tray — thaw a cube or two whenever you want to throw a quick teriyaki burger together on a weeknight.
Burger King Teriyaki Whopper Jr (Copycat, Chef-Crafted)
Ingredients
Teriyaki Glaze
- ½ cup low-sodium soy sauce Choose a smooth, naturally brewed brand for best flavor
- ¼ cup 100% pineapple juice Not from concentrate, for balanced sweetness and brightness
- 3 tbsp dark brown sugar, packed Dark for deeper molasses notes
- 2 tbsp mirin If unavailable, add 2 tbsp extra pineapple juice + 1 tsp sugar
- 1 tbsp rice vinegar Unseasoned, to balance sweetness
- 1 tsp fresh ginger, finely grated Microplane for a smooth texture
- 2 cloves garlic, minced About 2 tsp, minced very fine
- 1 tsp toasted sesame oil Aromatics; add off the heat for best aroma
- ¼ tsp black pepper Freshly ground
- 2 tsp cornstarch Thickens the glaze so it clings to the patty
- 1 tbsp cold water For cornstarch slurry
Teriyaki Onions
- 1 tbsp neutral oil Canola or avocado oil
- 1 medium sweet onion, thinly sliced Vidalia or similar; about 1 1/2 cups
- 1 pinch kosher salt Helps onions soften and brown evenly
- 2 tbsp prepared teriyaki glaze From above; for finishing onions
Beef Patties
- 1 lb 80/20 ground beef, well-chilled 80% lean for juiciness; keep cold for better browning
- 1 ¼ tsp kosher salt Diamond Crystal; use 3/4 tsp if Morton
- ½ tsp black pepper Freshly ground
Buns & Toppings
- 4 pieces sesame seed burger buns Soft-style buns, Jr-sized if available
- 2 tbsp unsalted butter, softened For toasting buns
- ¼ cup mayonnaise Kewpie recommended for extra umami; regular mayo works
- 1 cup iceberg lettuce, finely shredded Ice-cold and well-dried for crunch
- 8 slices ripe Roma tomato About 2 medium tomatoes, sliced 1/4-inch thick
- 8 chips dill pickles (optional) Adds brightness to cut the glaze
- 4 slices American cheese (optional) For a melty, classic fast-food note
For Assembly
- ¼ cup additional teriyaki glaze, warm For brushing patties and drizzling during assembly
Instructions
- Make the teriyaki glaze (5 minutes): In a small saucepan, whisk together soy sauce, pineapple juice, brown sugar, mirin, rice vinegar, ginger, garlic, and black pepper. Bring to a gentle simmer over medium heat. In a separate cup, stir cornstarch with cold water to make a slurry, then whisk it into the saucepan. Simmer, stirring, until glossy and just thick enough to coat a spoon, about 5 minutes. Remove from heat and stir in sesame oil. Keep warm. Sensory cue: the glaze should be shiny, pourable, and aromatic with ginger-garlic.
- Cook the teriyaki onions (7 minutes): Heat neutral oil in a skillet over medium to medium-high heat. Add sliced sweet onion and a pinch of kosher salt; cook, stirring occasionally, until tender and lightly golden at the edges, 6–7 minutes. Reduce heat to low, add 2 tbsp teriyaki glaze, and toss to coat for 30 seconds. Sensory cue: onions should be silky with a mahogany sheen.
- Prep toppings and buns (part of 20-minute prep): Shred the iceberg lettuce and pat dry. Slice tomatoes. Split buns and spread cut sides lightly with softened butter; set aside. If using cheese, have slices ready.
- Form and season patties (part of 20-minute prep): Divide the ground beef into 4 equal portions (about 4 oz each). Gently shape into 4-inch rounds and press a shallow dimple in the center of each to prevent doming. Season both sides with kosher salt and black pepper just before cooking. Tip: handle minimally to keep patties tender.
- Heat your cooking surface (5 minutes): For a grill, preheat to medium-high, about 450°F (232°C). For a broiler, set to High, about 500°F (260°C) and preheat a rack 6 inches from the element. For a cast-iron skillet, preheat over medium-high until a drop of water skitters on the surface (about 5 minutes).
- Cook the patties (6 minutes): Grill or sear the patties for 3 minutes on the first side until well browned and edges look set. Flip, cook 2 minutes, then brush the tops with teriyaki glaze and cook 1 minute more (add cheese now if using). Target doneness is medium to medium-well; for food safety, ground beef should reach 160°F (71°C). Sensory cue: sizzling edges, caramelized glaze, beefy aroma.
- Toast the buns (1–2 minutes): Place buttered buns cut-side down on the grill or skillet until lightly golden, 1–2 minutes. They should smell nutty and feel crisp at the edges while remaining soft inside.
- Assemble (2 minutes): Spread mayonnaise on the bottom bun. Add a few pickle chips (optional), then the glazed patty. Spoon a ribbon of warm teriyaki glaze over the patty, top with a generous forkful of teriyaki onions, a tuft of shredded iceberg, and 2 tomato slices. Crown with the top bun.
- Rest and serve (1 minute): Let the burger sit for 1 minute so juices settle and the glaze sets slightly. Serve immediately while the bun is warm and the lettuce stays crisp.
Notes
Chef’s Tips
- Glaze balance: If it tastes too salty, whisk in 1–2 tsp pineapple juice. If too sweet, add 1–2 tsp rice vinegar.
- Extra char: For a fast-food-style char, broil the cooked, glazed patty for 20–30 seconds to kiss the glaze with caramelization.
- Dietary tweaks: Use a plant-based patty and vegan mayo; swap butter for neutral oil and check your bun is vegan-friendly.
- Onion shortcut: To speed browning, add a pinch of sugar to onions at the 3-minute mark.
- Sauce texture: Mortar-and-pestle the ginger and garlic with a pinch of salt for a smoother, more integrated aromatic paste. A mini food processor works too.
Serving Suggestions
Plate the burger slightly off-center on a warm plate. Drizzle a fine zigzag of teriyaki glaze around the rim and sprinkle a few toasted sesame seeds for visual echo. Serve with crisp shoestring fries or sesame-cabbage slaw and a chilled yuzu soda, iced tea, or a light lager. Visual cues of perfection: a glossy, lacquered patty; vibrant green lettuce; ruby tomato; and steam rising as you lift the top bun.Culinary Context
This burger bridges American flame-grilled classics with Japanese teriyaki—an approach popularized by fast-food chains and home cooks alike. Pineapple juice nods to the sweeter regional teriyaki styles, while the char and sesame bun keep it comfortingly familiar. My first inspiration for this glaze came from a Tokyo diner where the chef brushed yakitori with tare until it shone—this burger borrows that same lacquered brilliance.Optional Advanced Instructions
- Make-ahead: Teriyaki glaze and onions can be made up to 3 days ahead; store chilled and warm gently to serve.
- Parallel cooking: Start the onions while the glaze simmers; preheat the grill as onions finish to keep total cook time tight.
- Beginner alternative: Use a nonstick skillet for easier cleanup and more forgiving searing.
Timing
- Prep Time: 20 minutes (0 hr 20 min)
- Cook Time: 24 minutes (0 hr 24 min)
- Total Time: 44 minutes (0 hr 44 min)
Course
Lunch or DinnerOrigin / Cuisine
Japanese-American fast-food fusionExtra Tips
- Salt brands vary: If using Morton kosher salt, reduce to 3/4 tsp for the patties.
- Bun integrity: Lightly toasting prevents sogginess from the glaze and keeps structural bite.
- Heat control: If glaze thickens too much as it cools, whisk in 1–2 tsp warm water to loosen to a brushable consistency.
Nutrition
Frequently asked questions
What internal temperature should the beef patty reach?
Ground beef patties need to hit 160°F (71°C) internal temperature. Use an instant-read thermometer — pressing on the patty to check doneness doesn’t work reliably with glazed burgers because the crust can feel firm before the center is safe.
Can I make the teriyaki glaze ahead of time?
Yes — the glaze keeps in the fridge for up to a week in a sealed jar. Make it the night before and you cut about 10 minutes off your active cook time, which also means one less thing on the stove when you’re assembling everything.
Can I use a cast iron skillet instead of a grill?
A cast iron skillet works well and gives you good crust on the patty. Get it properly hot before the patty goes in — a drop of water should evaporate immediately — and use a splatter screen because the glaze smokes a little.
Is low-sodium soy sauce important or can I use regular?
Low-sodium soy sauce is worth using here. The glaze reduces and concentrates, and regular soy sauce can make the finished burger noticeably salty — especially combined with the mirin and brown sugar.
Can I freeze the uncooked patties with the glaze already on them?
Freeze the raw patties plain, without glaze. Glaze applied before freezing tends to make the surface wet and uneven when it thaws, which prevents a good sear. Apply the glaze during cooking as the recipe directs.
If you liked this one
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