Transform your dinner routine with this flavorful slow cooker pepper steak recipe. Tender strips of beef sirloin are slow-cooked to perfection with a savory blend of spices and colorful bell peppers. This dish is perfect for busy weeknights or a cozy weekend meal, offering a delicious and effortless way to enjoy a hearty, home-cooked meal.
While most ingredients for this recipe are commonly found in your pantry, you might need to pick up a few items from the supermarket. Ensure you have beef sirloin for the main protein, and don't forget the worcestershire sauce, which adds a unique depth of flavor. Fresh bell peppers and onion are essential for the dish's vibrant color and taste.

Ingredients For Slow Cooker Pepper Steak Recipe
Beef sirloin: Tender cuts of beef that are perfect for slow cooking, providing a rich and hearty flavor.
Beef broth: A savory liquid that enhances the meat's flavor and keeps it moist during cooking.
Soy sauce: Adds a salty, umami taste that complements the beef.
Worcestershire sauce: A fermented liquid condiment that brings a complex, tangy flavor to the dish.
Garlic powder: Provides a subtle garlic flavor without the need for fresh garlic.
Ground black pepper: Adds a bit of heat and enhances the overall flavor profile.
Onion: Sliced for a sweet and savory addition to the dish.
Bell peppers: Sliced for a colorful and crunchy texture.
Cornstarch: Used to thicken the sauce, giving it a nice consistency.
Water: Mixed with cornstarch to create a slurry for thickening the sauce.
Technique Tip for This Recipe
To enhance the flavor of your beef sirloin, consider searing the strips in a hot pan with a little oil before placing them in the slow cooker. This will create a caramelized crust on the meat, adding depth and richness to the final dish.
Suggested Side Dishes
Alternative Ingredients
beef sirloin - Substitute with chicken breast: Chicken breast is a lean protein that can absorb flavors well and cooks to a tender texture in a slow cooker.
beef broth - Substitute with vegetable broth: Vegetable broth provides a similar depth of flavor and is a good option for those avoiding red meat.
soy sauce - Substitute with tamari: Tamari is a gluten-free alternative to soy sauce with a similar umami flavor.
worcestershire sauce - Substitute with balsamic vinegar: Balsamic vinegar adds a tangy and slightly sweet flavor that can mimic the complexity of Worcestershire sauce.
garlic powder - Substitute with fresh garlic: Fresh garlic offers a more robust and aromatic flavor compared to garlic powder.
ground black pepper - Substitute with white pepper: White pepper has a milder flavor and can be used to maintain the peppery taste without overpowering the dish.
onion - Substitute with shallots: Shallots provide a similar flavor profile but are slightly sweeter and more delicate.
bell peppers - Substitute with poblano peppers: Poblano peppers offer a mild heat and a rich, earthy flavor that can add depth to the dish.
cornstarch - Substitute with arrowroot powder: Arrowroot powder is a gluten-free thickening agent that works similarly to cornstarch.
water - Substitute with chicken broth: Chicken broth adds extra flavor compared to plain water, enhancing the overall taste of the dish.
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How to Store or Freeze This Dish
Allow the pepper steak to cool completely before storing. This helps prevent condensation, which can lead to soggy vegetables and diluted flavors.
Transfer the cooled pepper steak into airtight containers. For best results, use containers that are just the right size to minimize air exposure.
Label each container with the date and contents. This ensures you know exactly what you're grabbing from the freezer or fridge and helps you keep track of freshness.
Store the containers in the refrigerator if you plan to consume the pepper steak within 3-4 days. This keeps the beef and vegetables fresh and flavorful.
For longer storage, place the airtight containers in the freezer. The pepper steak can be frozen for up to 3 months without significant loss of quality.
When ready to reheat, thaw the frozen pepper steak in the refrigerator overnight. This gradual thawing helps maintain the texture of the beef and bell peppers.
Reheat the pepper steak on the stovetop over medium heat until it's warmed through. Stir occasionally to ensure even heating and to prevent sticking.
Alternatively, you can reheat the pepper steak in the microwave. Place it in a microwave-safe dish, cover it loosely, and heat in 1-minute intervals, stirring in between, until hot.
If the sauce has thickened too much during storage, add a splash of beef broth or water while reheating to achieve the desired consistency.
Serve the reheated pepper steak over fresh rice or noodles for a quick and satisfying meal.
Essential Tools for This Recipe
Slow cooker: This is the main appliance used to cook the pepper steak slowly over several hours, ensuring the meat becomes tender and the flavors meld together.
Cutting board: Essential for safely slicing the beef sirloin, onion, and bell peppers.
Chef's knife: A sharp knife is crucial for efficiently and cleanly cutting the beef and vegetables into strips and slices.
Measuring cups: Used to measure out the beef broth and soy sauce accurately.
Measuring spoons: Necessary for measuring the worcestershire sauce, garlic powder, and ground black pepper.
Small bowls: Handy for mixing the beef broth mixture and the cornstarch slurry.
Mixing spoon: Used to stir the cornstarch and water together until smooth.
Tongs: Useful for placing the beef strips into the slow cooker and for stirring the ingredients if needed.
Serving spoon: Ideal for serving the finished pepper steak over rice or noodles.
How to Save Time on This Recipe
Prep ingredients ahead: Slice the beef, onions, and bell peppers the night before to save time in the morning.
Use pre-made broth: Opt for store-bought beef broth to cut down on preparation time.
Combine sauces early: Mix the soy sauce, worcestershire sauce, garlic powder, and black pepper in advance and store in the fridge.
Utilize slow cooker liners: These make cleanup a breeze, saving you time after cooking.
Double the recipe: Make extra and freeze portions for a quick meal later.

Slow Cooker Pepper Steak Recipe
Ingredients
Main Ingredients
- 1 lb Beef sirloin, cut into strips
- 1 cup Beef broth
- ¼ cup Soy sauce
- 1 tablespoon Worcestershire sauce
- 1 teaspoon Garlic powder
- 1 teaspoon Ground black pepper
- 1 medium Onion, sliced
- 2 large Bell peppers, sliced
- 2 tablespoon Cornstarch
- 2 tablespoon Water
Instructions
- 1. Place beef strips in the slow cooker.
- 2. In a small bowl, combine beef broth, soy sauce, Worcestershire sauce, garlic powder, and black pepper. Pour over the beef.
- 3. Add sliced onion and bell peppers on top.
- 4. Cover and cook on low for 6 hours.
- 5. In a small bowl, mix cornstarch and water until smooth. Stir into the slow cooker. Cook for an additional 30 minutes, or until the sauce is thickened.
- 6. Serve hot over rice or noodles.
Nutritional Value
Keywords
Suggested Appetizers and Desserts
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