Air Fryer Korean Beef Bulgogi Sandwich
Tender marinated beef sirloin, crisped in the air fryer, layered on a toasted brioche bun with spicy kimchi, creamy gochujang mayo, and a sprinkle of toasted sesame seeds. A quick weeknight dinner that delivers bold Korean flavors in under 30 minutes.
Steps
Before you start
- Slice the beef sirloin thinly (¼ inch) while partially frozen for easier handling
- Preheat the air fryer to 380°F (193°C)
- Have all marinade ingredients measured and ready
Make gochujang mayo
- In a small bowl, whisk together mayonnaise, gochujang, and honey until smooth and well combined.
- Set aside.
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Ready when: mixture is uniform and creamy
Tip: Make this while the air fryer preheats to save time
Combine marinade ingredients
- In a large bowl, whisk together soy sauce, brown sugar, sesame oil, minced ginger, minced garlic, and rice vinegar until the sugar dissolves completely.
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Ready when: brown sugar is fully dissolved
Tip: Dissolving the sugar in the liquid first ensures even seasoning on the meat
Marinate the beef
- Add the sliced beef sirloin to the marinade and stir gently to coat all pieces evenly.
- Let sit at room temperature for 10 minutes while the air fryer finishes preheating.
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Ready when: all beef pieces are evenly wet with marinade
Tip: Don't marinate longer than 10 minutes with this ratio—the salt in the soy sauce can cause the meat to toughen
Air fry the beefOven 380°F / 195°C
- Working in batches to avoid overcrowding, transfer the marinated beef to the preheated air fryer basket (380°F / 193°C).
- Spread the pieces in a single layer.
- Air fry for 6–8 minutes, shaking the basket halfway through.
- The beef should be browned and caramelized at the edges, with no pink in the center.
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Ready when: beef is deeply browned, edges are caramelized, no pink remains, meat is tender when pierced
Tip: Shake the basket at the 3–4 minute mark to ensure even browning; overcrowding prevents crisping
Toast the bunsOven 350°F / 175°C
- Lightly butter the cut sides of each brioche bun.
- Place them cut-side up in the air fryer basket at 350°F (177°C) for 2–3 minutes until golden and lightly crisp.
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Ready when: buns are golden brown with a light crunch on the cut side
Tip: Toast the buns while the beef is cooking to keep everything hot; don't let them go dark or they'll taste burnt
Assemble the sandwiches
- Spread a thin layer of gochujang mayo on both cut sides of each toasted bun.
- On the bottom half, layer about 6 ounces (170 g) of the warm cooked bulgogi beef.
- Top with 2–3 tablespoons of chopped kimchi.
- Sprinkle with toasted sesame seeds and sliced scallions if using.
- Cap with the top bun and serve immediately.
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Tip: Don't assemble more than a minute or two before eating; the heat from the beef will soften the bun pleasantly but keep it from becoming soggy
Good to know
Tips
- Slice the beef sirloin against the grain for maximum tenderness; partially freezing it for 30 minutes makes slicing easier and thinner
- Toast the sesame seeds dry in a skillet over medium heat for 2–3 minutes before sprinkling on the sandwich to deepen their nutty flavor
- For extra heat, add a teaspoon of gochugaru (Korean red chili flakes) to the marinade or sprinkle it on the finished sandwich
- The air fryer crisps the beef's edges while keeping the interior juicy—if using a regular oven or stovetop, the texture won't be quite as caramelized
Make ahead
You can prepare the gochujang mayo and marinade up to 1 day ahead. Store the mayo in the fridge in an airtight container. Marinate the beef up to 8 hours ahead, but no more, to avoid toughening.
Storage & reheating
Best served immediately. Leftover cooked bulgogi beef keeps in an airtight container in the refrigerator for up to 3 days; reheat gently in the air fryer at 325°F (163°C) for 2–3 minutes. Do not freeze the assembled sandwich. Gochujang mayo keeps refrigerated for up to 1 week.
Substitutions
- beef sirloin, partially frozen → flank steak or ribeye. Both are tender and take on marinade well; adjust thickness to ¼ inch if slicing a thicker-grained cut
- gochujang (Korean red chili paste) → sriracha or sambal oelek mixed with a pinch of miso paste. Gives similar heat and umami; start with 1½ tbsp sriracha + ½ tsp white miso and adjust to taste
- kimchi, drained → quick-pickled daikon or cucumber, or sliced jalapeños. You'll lose some fermented funk, but the crunch and spice will remain; use the same amount
- brioche sandwich buns → soft white sandwich rolls, artisan rolls, or even crispy croissants. Any sturdy bun that won't fall apart works; avoid thin-walled rolls that may compress under the meat
