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Slow Cooker Mongolian Beef – Tender, Saucy, and Better Than Takeout

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Tender beef slow-cooked in a rich garlic-ginger soy sauce with brown sugar — this slow cooker Mongolian beef is better than takeout and perfect for cozy dinners.

Ingredients

Scale
  • lbs flank steak, thinly sliced

  • ¾ cup low-sodium soy sauce

  • ½ cup brown sugar

  • 1 tbsp minced garlic

  • 1 tbsp grated fresh ginger

  • ½ cup water or beef broth

  • 2 tbsp cornstarch

  • Optional: 1 tsp rice vinegar or hoisin sauce

  • Garnish: chopped scallions, sesame seeds, red pepper flakes

Instructions

  • Place sliced beef in slow cooker.

  • In a bowl, mix soy sauce, brown sugar, garlic, ginger, water, and cornstarch.

  • Pour over beef and stir to coat evenly.

  • Cover and cook on low for 4–5 hours or high for 2.5–3 hours.

  • If needed, thicken sauce at the end with extra cornstarch slurry.

  • Garnish and serve hot over rice or noodles.

Notes

  • Add veggies in the last 30 minutes if desired.

  • Slice beef against the grain for tenderness.

  • Store leftovers up to 4 days or freeze for future meals.