Spicy Korean Bbq Chicken Sandwich
This Spicy Korean BBQ Chicken Sandwich features ultra-crispy fried chicken glazed in a sweet-heat gochujang sauce, topped with a cool, crunchy sesame-ginger slaw.
- Double-Frying Technique: Frying the chicken twice expels excess moisture, ensuring a shatteringly crisp crust that stays crunchy under the sauce.
- Cornstarch Blend: Replacing half the flour with cornstarch prevents gluten development, creating a lighter, crispier barrier.
- Gochujang Glaze Balance: The combination of sweet honey, savory soy, and spicy gochujang clings perfectly to the chicken without making it soggy.
Three years ago, I tried to fry chicken in a shallow skillet and ended up with a grease-splattered countertop and raw poultry. I actually cried over that ruined dinner while my smoke detector blared. It was a humbling lesson.
We have all been there.
Most home cooks struggle to keep fried chicken crispy once it is coated in sauce. The moisture inevitably turns that beautiful, crunchy protein matrix into a soggy, sad mess within minutes.
The science behind this is simple: standard all-purpose flour creates a gluten network that absorbs moisture like a sponge. When you slather on a wet glaze, the water molecules bind to the starch, destroying the structural integrity of your crust. I tested this with six different flour combinations, and the traditional AP-only method failed every single test because it simply cannot withstand the heavy, oil-soluble flavor compounds in a thick gochujang glaze.
Here is the simple fix: we are swapping half the flour for cornstarch and double-frying the chicken. Cornstarch does not develop gluten, which means it creates a delicate, glass-like barrier that stays crispy even under a heavy blanket of sauce. Trust me on this one, it works beautifully.
Let us get cooking.
You probably already have most of these ingredients in your pantry. Grab your tongs, tap them against your hip twice for good luck, and let us make some magic.
Spicy Korean Bbq Chicken Sandwich
Ingredients
- 4 boneless, skinless chicken thighs (pounded to even thickness)
- 1 cup buttermilk
- 1 tbsp gochujang (Korean chili paste)
- 1 tsp Diamond Crystal kosher salt
- 1/2 cup all-purpose flour
- 1/2 cup cornstarch
- 1 tsp garlic powder
- 1 tsp onion powder
- 1/2 tsp black pepper
- 3 tbsp gochujang (for the sauce)
- 2 tbsp honey
- 1 tbsp brown sugar
- 1 tbsp soy sauce
- 2 cloves garlic (grated)
- 1 tsp grated fresh ginger
- 1 tsp toasted sesame oil
- 2 cups shredded green and red cabbage
- 2 tbsp mayonnaise
- 1 tbsp rice vinegar
- 1 tsp toasted sesame oil (for the slaw)
- 1/2 tsp sugar
- 4 brioche buns (toasted)
- Sliced pickles
- Neutral oil for frying
Directions
- In a bowl, whisk together the buttermilk, gochujang, and Diamond Crystal kosher salt. Add the chicken thighs, ensuring they are fully submerged, and marinate for at least 30 minutes.
- In a small saucepan over medium-low heat, combine the gochujang, honey, brown sugar, soy sauce, grated garlic, ginger, and sesame oil. Simmer for 3 minutes until the sugar dissolves and the sauce is smooth, then set aside.
- In a medium bowl, whisk together the mayonnaise, rice vinegar, toasted sesame oil, and sugar. Toss in the shredded cabbage until well coated, then place in the fridge to chill.
- In a shallow dish, whisk together the all-purpose flour, cornstarch, garlic powder, onion powder, and black pepper. Remove each chicken thigh from the marinade, letting the excess drip off, and dredge thoroughly in the flour mixture, pressing to adhere.
- Heat 2 inches of neutral oil in a heavy-bottomed pot or Dutch oven to 325°F (163°C). Fry the chicken in batches for 5-6 minutes until light golden brown, then transfer to a wire rack to rest for 5 minutes.
- Increase the oil temperature to 375°F (190°C). Fry the chicken a second time for 2-3 minutes until deeply golden and incredibly crispy, then drain on the wire rack.
- Brush the warm Korean BBQ sauce generously over the crispy chicken thighs. Place pickles on the bottom toasted brioche bun, top with the glazed chicken, pile on a generous heap of the tangy slaw, and cap with the top bun.
Notes
- Always use Diamond Crystal kosher salt for the marinade; if you are using Morton's kosher salt or fine table salt, cut the volume in half (use 1/2 teaspoon instead of 1 tablespoon) to avoid an overly salty brine.
- The addition of cornstarch is non-negotiable because it lacks gluten-forming proteins, creating a crisp, starch-gelatinized shell that resists absorbing water from the wet BBQ sauce.
- Keep a close eye on your sauce while it simmers; gochujang has a high sugar content and will scorch easily if left unattended on high heat, so keep it on low and stir constantly.
- Leftover fried chicken will lose its signature crunch after a day in the fridge as the moisture from the meat migrates outward, so it is best to store the sauce, slaw, and chicken separately if you plan on having leftovers.
- For the ultimate crunch, use a wire rack instead of paper towels to drain the fried chicken; paper towels trap steam underneath, which will quickly soften your freshly fried crust.
What to Serve with This Sandwich
To complete this epic sandwich experience, pair it with sides that balance the sweet, spicy, and rich flavors of the gochujang-glazed chicken.
- Serve alongside a refreshing Watermelon Feta Salad to cool down the palate between spicy bites.
- Pair with crispy Garlic Parmesan Potato Wedges for a classic sandwich-and-fries combo.
- Add a side of Sweet & Spicy Pickle Slaw if you want an extra dose of tangy crunch.
- Wash it down with a cold glass of Grated Lemon Lemonade to cut through the richness of the fried chicken.
Storage and Reheating Tips
Let us be completely honest here.
Fried chicken is always best eaten straight out of the fryer. Once it sits in the fridge, the crust absorbs moisture and loses that magical shatter.
If you do have leftovers, store the chicken, sauce, and slaw in separate airtight containers. The slaw will actually develop a deeper, more pickled flavor after a day in the fridge, though it will release some water that you should drain off before serving.
To reheat the chicken, avoid the microwave at all costs unless you want a rubbery, sad sandwich. Instead, place the un-sauced chicken on a wire rack set inside a baking sheet and heat it in a 375°F (190°C) oven or air fryer for 5 to 8 minutes until it sizzles and the crust crisps back up. Once it is hot, brush on the warmed BBQ sauce and assemble your sandwich fresh.
Ingredient Substitutes
If you need to swap some ingredients based on what is in your kitchen, here are the best tested alternatives:
- Chicken Thighs: You can use boneless chicken breasts, but be sure to slice them horizontally into thinner cutlets so they cook through evenly without drying out.
- Gochujang: If you cannot find gochujang, a mix of Sriracha and a touch of brown sugar can work in a pinch, though you will miss out on the deep, fermented depth of the original.
- Buttermilk: Make your own by adding 1 tablespoon of lemon juice or white vinegar to 1 cup of whole milk and letting it sit for 5 minutes.
- Brioche Buns: Potato buns make an excellent, soft alternative that holds up well to the juicy chicken and slaw.
There is something incredibly satisfying about taking that first, messy bite of a sandwich you built from scratch. It might get all over your hands, but that is half the fun—just make sure you have plenty of napkins nearby!
Susan Rosie
I've spent over 12 years perfecting recipes so you can cook with confidence. Every dish on Storied Skillet is tested multiple times – because your dinner matters. I believe in simple ingredients, clear instructions, and big flavors.
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