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Pepper Steak in a Crock Pot

Pepper steak in a crock pot with a glossy soy-ginger sauce and tender flank steak. Slow-cooked with sweet brown sugar, bright rice vinegar, and colorful bell peppers for a flavorful, saucy main dish over white rice.
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Prep Time 15 minutes
Cook Time 5 hours
Total Time 5 hours 15 minutes
Servings: 4 servings
Course: Main Dish
Cuisine: Chinese-American
Calories: 620
Ingredients Equipment Method Notes

Ingredients
  

Flank steak and vegetables
  • 2 lb flank steak
  • 1 red bell pepper
  • 1 green bell pepper
  • 1 yellow bell pepper
  • 1 onion
  • 4 garlic
Pepper steak sauce
  • 0.5 cup soy sauce
  • 0.25 cup beef broth
  • 2 tbsp brown sugar
  • 1 tbsp rice vinegar
  • 1 tbsp fresh ginger
Thickening
  • 2 tbsp cornstarch
  • 2 tbsp cold water
Serving and garnish
  • 1 cooked white rice
  • 1 sesame seeds
  • 1 green onions

Equipment

  • 1 Dutch oven

Method
 

Layer in the slow cooker
  1. Place the sliced flank steak into the slow cooker in an even layer.
  2. Top with the sliced bell peppers, onion, and minced garlic so the vegetables are spread across the steak.
Build and cook the sauce
  1. Whisk together soy sauce, beef broth, brown sugar, rice vinegar, and grated ginger, then pour the mixture over the steak and vegetables.
  2. Cook on LOW for 5–6 hours until the steak is tender, or on HIGH for 2.5–3 hours until the steak is tender.
Thicken and serve
  1. Whisk cornstarch with cold water until smooth, then stir it into the slow cooker.
  2. Cook on HIGH for 15 minutes until the sauce thickens and coats the steak.
  3. Serve the pepper steak over cooked white rice and garnish with sesame seeds and green onions.

Notes

For the most tender results, slice the flank steak thinly against the grain and try not to over-stir during the first cook. Refrigerate leftovers in a sealed container for up to 3 days; reheat gently until steaming. Freezing is yes—freeze in portions for up to 2 months, then thaw and reheat on the stovetop or in the microwave. Dietary swap: use tamari (gluten-free soy sauce) if you need a gluten-free option.