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Slow Cooker Korean Beef

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Slow Cooker Korean Beef is a tender, sweet-and-savory dish with bold Korean flavors. Flank steak slowly cooks in a rich sauce made from soy, garlic, brown sugar, and sesame oil, resulting in melt-in-your-mouth beef perfect over rice or noodles, finished with sesame seeds and green onions.

Ingredients

1 ½ pounds flank steak, cut into bite-sized strips

¼ cup cornstarch

2 tablespoons sesame oil

½ teaspoon minced garlic (12 cloves)

½ cup soy sauce (low sodium preferred)

½ cup beef broth

¾ cup brown sugar

¼ cup onion, chopped

¼ teaspoon red pepper flakes (optional)

Sesame seeds and sliced green onions for garnish

Instructions

  1. Toss beef strips with cornstarch until evenly coated.
  2. Heat sesame oil in a skillet over medium-high heat. Sear beef 1–2 minutes per side to brown slightly. Transfer to slow cooker.
  3. Add garlic, soy sauce, beef broth, brown sugar, onion, and red pepper flakes to slow cooker. Stir to combine.
  4. Cover and cook on low 5–6 hours or high 2–3 hours until beef is tender and sauce thickened.
  5. Serve hot over rice or noodles, garnished with sesame seeds and sliced green onions.

Notes

Spicy: add extra red pepper flakes or sriracha.

Vegetable Boost: add bell peppers, carrots, or snap peas in the last 30 minutes.

Gluten-Free: use tamari or gluten-free soy sauce.

Make-Ahead: store beef and sauce separately up to 3 days.

Oven Option: sear beef and bake covered at 350°F (175°C) for 30–40 minutes.

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