Slow Cooker Pepper Steak: Tender & Savory

This slow cooker pepper steak delivers fork-tender beef and sweet bell peppers in a rich, savory sauce with almost no effort.

The meat simmers low and slow until it practically melts, while the peppers soften just enough to keep their color and texture. Serve it over steamed rice for a complete, satisfying meal that feels like takeout but is far more comforting.

Slow cooker pepper steak is the ultimate hands-off dinner. Thin strips of beef sirloin cook gently in a savory soy-based sauce with garlic, ginger, and a touch of brown sugar. Red and green bell peppers add color and a slight sweetness that balances the salty sauce.

The result is a glossy, tender dish that pairs beautifully with steamed rice. This recipe is perfect for busy weeknights or when you want a hearty meal without standing over the stove.

Ingredients

Why this recipe works

The slow cooker does all the work, turning an affordable cut of beef into fork-tender bites. Low, gentle heat breaks down the meat's connective tissue, so every piece is juicy and easy to chew.

The sauce thickens naturally as the meat cooks, creating a rich, clinging texture that coats each strip.

Layering the peppers and onions on top of the beef lets them steam and soften without turning mushy. They retain their shape and vibrant color, while their natural sugars caramelize slightly in the sauce. The result is a balanced dish with deep flavor and satisfying texture.

Notes and substitutions

Beef sirloin is a great choice for this recipe because it stays tender even after hours of cooking. Flank steak or round steak also work well—just slice them thinly against the grain. For best results, cut the beef into uniform strips so they cook evenly.

Use low-sodium soy sauce if you prefer a milder salt level, and adjust the salt at the end.

The cornstarch slurry is key for a glossy, thickened sauce; make sure to mix it thoroughly before adding it to the slow cooker. If you like extra heat, add a pinch of red pepper flakes.

• beef sirloin: flank steak or round steak, cut into thin strips
• soy sauce: tamari or coconut aminos for a gluten-free option
• brown sugar: honey or maple syrup
• beef broth: chicken broth or water

Equipment

• Slow cooker (5-6 quart)
• Cutting board
• Chef's knife
• Measuring cups and spoons
• Small bowl
• Serving spoon