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.
1½ 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
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.
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.