Ingredients

Equipment Needed

• •12-inch cast iron skillet or flat griddle
• •Small saucepan
• •Silicone pastry brush for glazing
• •Instant-read thermometer

Instructions

1. 1

   Prepare the teriyaki sauce

   Combine the soy sauce, brown sugar, mirin, rice vinegar, garlic, ginger, and sesame oil in a small saucepan. Bring to a simmer over medium heat, stirring until the sugar dissolves completely. The kitchen will fill with that unmistakable sweet-savory perfume. Let it bubble gently for two minutes to marry the flavors.

   Authentic Seattle teriyaki runs sweeter than you might expect. Trust the proportions. The sugar caramelizes during grilling and creates that signature lacquered finish.
2. 2

   Thicken the glaze

   Whisk the cornstarch with cold water in a small bowl until smooth. Pour this slurry into the simmering sauce while whisking constantly. The sauce will thicken within thirty seconds, coating a spoon with a glossy sheen. Remove from heat and divide the sauce: half for glazing during cooking, half reserved for finishing. This separation prevents cross-contamination from raw chicken.

3. 3

   Prepare the chicken

   Pat the chicken thighs thoroughly dry with paper towels. Moisture is the enemy of caramelization. If any thighs are significantly thicker than others, pound them gently between plastic wrap to even thickness, about half an inch. This ensures they cook at the same rate. Season lightly with salt on both sides.

   Chicken thighs are non-negotiable here. Breast meat dries out before the glaze can properly caramelize. Thighs stay juicy through the repeated glazing process.
4. 4

   Sear the chicken

   Heat vegetable oil in a large cast iron skillet or on a flat griddle over medium-high heat until shimmering. Add the chicken thighs smooth-side down, leaving space between each piece. You should hear an aggressive sizzle. Let them cook undisturbed for three minutes until the underside develops golden-brown patches.

5. 5

   Begin the glazing process

   Brush the tops of the chicken generously with teriyaki glaze from your glazing portion. Flip each thigh and let the glazed side hit the hot surface, where it will caramelize and darken. Cook for two minutes. Brush the new top side with more glaze. Flip again. You're building layers of lacquered flavor.

   Keep your heat at medium-high but watch for burning. The sugar in the glaze walks a fine line between caramelized and scorched. Adjust as needed.
6. 6

   Finish the chicken

   Continue glazing and flipping every minute or so, three to four more times total. The chicken is done when it reaches 165°F internally and the exterior shows a deep mahogany color with sticky, slightly charred edges. The surface should look lacquered, almost shiny. Total cooking time runs about ten to twelve minutes. Transfer to a cutting board and let rest for three minutes.

7. 7

   Toast the buns

   While the chicken rests, split the buns and toast them cut-side down in the same skillet, pressing gently. The residual teriyaki on the pan will flavor the bread. Toast just until golden with a few darker spots, about one minute. The exterior should crisp while the interior stays pillowy.

8. 8

   Slice the chicken

   Slice each chicken thigh against the grain into strips about half an inch wide. Cutting against the grain shortens the muscle fibers and makes each bite more tender. Toss the sliced chicken with a spoonful of the reserved finishing sauce to add one final layer of glaze.

9. 9

   Assemble the sandwiches

   Spread mayonnaise generously on both cut sides of each toasted bun. Pile the sliced teriyaki chicken on the bottom halves, letting the pieces overlap and tumble naturally. Drizzle with more reserved sauce. Top with a generous handful of shredded iceberg lettuce, pressing it gently into the chicken. Scatter sesame seeds and sliced green onions over the lettuce. Crown with the top bun and press down just enough to compress slightly.

   The ratio matters. You want enough lettuce to provide crunch and coolness but not so much that it overwhelms the chicken. About a quarter cup per sandwich strikes the balance.
10. 10

    Serve immediately

    These sandwiches are best eaten within minutes of assembly, while the chicken is still warm and the bun hasn't absorbed too much sauce. Serve with extra teriyaki on the side for dipping and plenty of napkins. This is honest, messy food.

Chef Tips

• •Japanese mayonnaise (Kewpie) has a richer, slightly sweeter flavor than American mayo thanks to rice vinegar and egg yolks only. Find it in Asian grocery stores or online. Regular mayonnaise works, but you'll notice the difference.
• •For transporting these sandwiches to a picnic or work lunch, pack the components separately: chicken in one container with sauce drizzled over, shredded lettuce in a bag, toasted buns in another. Assemble just before eating to prevent sogginess.
• •The teriyaki sauce recipe makes slightly more than you need. The extra keeps refrigerated for two weeks and works beautifully on grilled salmon, pork chops, or tossed with stir-fried vegetables.
• •If you can find it, look for a brioche-style burger bun. The slight sweetness echoes the teriyaki glaze and the tender crumb absorbs sauce without falling apart.

Advance Preparation

• •The teriyaki sauce can be made up to one week ahead and refrigerated. It will thicken as it cools; warm gently before using.
• •Chicken can be pounded and seasoned up to four hours ahead, kept refrigerated on a plate covered with plastic wrap.
• •For meal prep, cook the chicken through step 6 and refrigerate. Reheat gently in a skillet with a splash of sauce before slicing and assembling.

Frequently Asked Questions

Nutrition Information

1 serving (about 215g)