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Pepper Steak in a Crock Pot – Tender, Saucy, and Set-It-and-Forget-It

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This Crock Pot Pepper Steak features tender beef strips slow-cooked with colorful bell peppers in a savory soy-based sauce. Easy, comforting, and perfect for weeknight meals or meal prep.

Ingredients

Scale
  • 1.5 lbs beef sirloin or flank steak, thinly sliced

  • 1 red bell pepper, sliced

  • 1 green bell pepper, sliced

  • 1 yellow bell pepper, sliced

  • 1 medium onion, sliced

  • 3 garlic cloves, minced

  • ½ cup low-sodium soy sauce

  • 1 cup beef broth

  • 1 tbsp tomato paste

  • 1 tbsp brown sugar

  • ½ tsp black pepper

  • 1 tbsp cornstarch + 2 tbsp water (slurry)

  • Optional: 1 tsp sesame oil, green onions, sesame seeds

Instructions

  • Place sliced onions and bell peppers in the bottom of the Crock Pot.

  • Layer beef strips over vegetables and sprinkle garlic on top.

  • In a bowl, whisk together soy sauce, beef broth, tomato paste, brown sugar, and black pepper. Pour over the meat and vegetables.

  • Cover and cook on Low for 5–6 hours or High for 3–4 hours.

  • Mix cornstarch and water into a slurry. Add to the Crock Pot during the final 30 minutes and stir gently.

  • Let sauce thicken, then finish with sesame oil and garnish if desired.

  • Serve hot over rice, noodles, or mashed potatoes.

Notes

Add chili flakes for heat, or swap tomato paste with hoisin for a sweeter variation. Can be refrigerated or frozen for easy leftovers.