When you want a comforting dinner that practically cooks itself, Slow Cooker Pepper Steak is an excellent choice. Tender strips of beef slowly simmer with colorful bell peppers and onions in a rich, savory sauce until everything is flavorful and delicious.
The slow cooker gives the beef plenty of time to become tender while allowing the sauce to develop a deep, satisfying flavor. Served over steamed rice, mashed potatoes, or noodles, this simple meal turns everyday ingredients into a cozy family dinner.
It is especially useful on busy days because most of the preparation can be done before the slow cooker takes over.
Why You’ll Love This Recipe
- Tender, flavorful beef
- Colorful bell peppers and onions
- Rich, savory sauce
- Easy slow-cooker preparation
- Perfect over rice or noodles
- Great for family dinners
- Excellent for leftovers
Ingredients
For the Pepper Steak
- 2 pounds beef sirloin, chuck, or round steak, cut into thin strips
- 2 tablespoons vegetable oil
- 1 large onion, sliced
- 1 green bell pepper, sliced
- 1 red bell pepper, sliced
- 1 yellow bell pepper, sliced
- 3 cloves garlic, minced
- 1 cup beef broth
- 1/3 cup low-sodium soy sauce
- 2 tablespoons Worcestershire sauce
- 2 tablespoons tomato paste
- 1 tablespoon brown sugar
- 1 teaspoon paprika
- 1/2 teaspoon black pepper
- 1/2 teaspoon dried oregano
- 1/2 teaspoon onion powder
- 1/4 teaspoon red pepper flakes, optional
For Thickening the Sauce
- 2 tablespoons cornstarch
- 3 tablespoons cold water
For Serving
- Steamed white or brown rice
- Cooked egg noodles, optional
- Fresh parsley or green onions, for garnish
How to Make Slow Cooker Pepper Steak
1. Slice the Beef
Cut the beef into thin, bite-sized strips.
For the most tender result, slice the meat against the grain. This shortens the muscle fibers and makes each bite easier to chew.
Pat the beef dry with paper towels before cooking.
2. Brown the Beef
Heat the vegetable oil in a large skillet over medium-high heat.
Working in batches, quickly brown the beef on both sides.
You don’t need to cook it through at this point. The goal is simply to develop a flavorful browned exterior.
Transfer the beef to the slow cooker.
While browning is optional, it adds noticeably more flavor to the finished dish.
3. Sauté the Aromatics
Using the same skillet, add the sliced onion.
Cook for approximately 2–3 minutes.
Add the minced garlic and cook for another 30 seconds.
Turn off the heat.
4. Add Everything to the Slow Cooker
Place the sliced green, red, and yellow bell peppers into the slow cooker with the beef.
Add the sautéed onions and garlic.
In a bowl, whisk together:
- Beef broth
- Soy sauce
- Worcestershire sauce
- Tomato paste
- Brown sugar
- Paprika
- Black pepper
- Oregano
- Onion powder
- Red pepper flakes, if using
Pour the sauce over the beef and vegetables.
Stir gently to combine.
5. Slow Cook
Cover and cook on:
LOW: 6–7 hours
or
HIGH: 3–4 hours
The beef should be tender and the vegetables should be cooked through.
Avoid lifting the lid repeatedly during cooking because it allows heat to escape and can extend the cooking time.
6. Thicken the Sauce
About 20–30 minutes before serving, mix the cornstarch with cold water until smooth.
Pour the mixture into the slow cooker and stir gently.
Cover and continue cooking on HIGH for approximately 15–20 minutes, or until the sauce thickens into a rich gravy.
If you prefer a thinner sauce, use less cornstarch.
7. Taste and Finish
Taste the sauce before serving.
Because soy sauce and Worcestershire sauce can both be salty, additional salt may not be necessary.
Garnish with chopped parsley or sliced green onions.
Serve hot over freshly cooked rice or noodles.
Tips for the Best Slow Cooker Pepper Steak
Slice the beef correctly
Thin strips cut against the grain will give you a much more tender result.
Don’t skip browning if you have time
The slow cooker will cook the beef beautifully, but browning first creates deeper roasted flavors.
Don’t add too much liquid
The slow cooker traps moisture, so you don’t need to completely submerge the ingredients. Too much liquid can produce a thin sauce.
Add some peppers later for more texture
If you prefer your bell peppers slightly crisp rather than very soft, add some of the sliced peppers during the final 60–90 minutes of cooking.
Taste before adding salt
Soy sauce and Worcestershire sauce already contribute plenty of salt and savory flavor.
What Beef Is Best?
Several cuts can work well.
Sirloin: Lean and flavorful, with a relatively quick cooking time.
Chuck: More marbled and particularly good for slow cooking. It can become extremely tender.
Round steak: Budget-friendly and works well when sliced thinly and cooked slowly.
Whichever cut you choose, cutting against the grain is important.
Serving Suggestions
Serve your pepper steak over:
- Steamed white rice
- Brown rice
- Jasmine rice
- Egg noodles
- Mashed potatoes
- Cauliflower rice
- Quinoa
For a complete dinner, add a simple cucumber salad, steamed broccoli, or roasted vegetables on the side.
Make-Ahead Instructions
You can prepare the sauce and slice the vegetables and beef the night before.
Store the prepared ingredients separately in the refrigerator until you’re ready to cook.
If browning the beef, allow it to cool appropriately before refrigerating and then transfer it to the slow cooker when ready.
Storage
Allow leftovers to cool before transferring them to an airtight container.
Refrigerate for up to 3–4 days.
Reheat gently in a saucepan or microwave until thoroughly heated.
The sauce may thicken in the refrigerator. Add a small splash of beef broth or water when reheating if necessary.
Can You Freeze Pepper Steak?
Yes.
Allow the cooked pepper steak to cool completely, then transfer it to a freezer-safe container.
Freeze for up to approximately 3 months.
Thaw overnight in the refrigerator and reheat gently.
The bell peppers may become somewhat softer after freezing and thawing, but the flavor remains delicious.
Frequently Asked Questions
Can I use frozen bell peppers?
Yes, although fresh peppers generally provide better texture. Frozen peppers can be added directly to the slow cooker.
Can I skip browning the beef?
Yes. You can put the raw beef directly into the slow cooker. Browning is recommended for extra flavor but isn’t essential.
Why is my pepper steak tough?
The beef may need more cooking time, or the cut may be naturally lean. Slow cooking until the connective tissue breaks down usually improves tenderness. Also make sure you’re slicing against the grain.
Can I make this spicy?
Absolutely. Add red pepper flakes, cayenne pepper, sliced jalapeños, or your favorite chili sauce.
Can I make it without Worcestershire sauce?
Yes. You can simply omit it or replace it with a little additional soy sauce. Keep in mind that the flavor will be slightly different.
Recipe at a Glance
Prep Time: 20 minutes
Cook Time: 6–7 hours on LOW or 3–4 hours on HIGH
Total Time: About 6½–7½ hours on LOW
Servings: 6
Cuisine: American-inspired
Category: Slow Cooker, Beef, Dinner
Final Thoughts
This Slow Cooker Pepper Steak is a perfect example of how a few simple ingredients can become a deeply satisfying meal with very little hands-on work.
Tender beef, sweet bell peppers, onions, garlic, and a savory sauce come together slowly until the meat is flavorful and easy to pull apart. Serve it over hot rice to soak up every drop of the rich gravy.
For the best result, take a few extra minutes to brown the beef before adding it to the slow cooker and slice the meat against the grain. Those two simple steps can make a noticeable difference.
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Meta Description: This easy Slow Cooker Pepper Steak features tender beef, colorful bell peppers, onions, and a rich savory sauce. Serve it over rice for a comforting family dinner.