Name: Slow Cooker Pepper Steak Recipe
Prep time: 15 min
Cook time: 5 h
Total time: 5 h 15 min
Cuisine: American
Ingredients: 2 lbs. beef strips; 1 green bell pepper, sliced thick; 1 red bell pepper, sliced thick; 1 white onion, sliced; ½ cup water; 2 beef bouillon cubes; 3 Tbsp. soy sauce; 1 tsp. Worcestershire sauce; ¼ tsp. ground ginger; ¼ tsp. garlic powder; ½ tsp. black pepper; 2 tsp. brown sugar (or honey or white sugar); 1 Tbsp. cornstarch; ¼ tsp. red pepper flakes (optional)

Jump to Recipe· 3.9 from 53 reviews

If you’ve been searching for a hearty, comforting meal that practically makes itself, then this Slow Cooker Pepper Steak Recipe is your new best friend. Tender beef strips, vibrant bell peppers, and sweet onions all swim in a savory, slightly sweet sauce that develops rich layers of flavor as it slowly cooks. It’s the kind of dish that wraps you in warmth with every bite and is incredibly easy to prepare, making it perfect for busy days when you want something delicious without the fuss.

Ingredients You’ll Need

The image shows various sliced ingredients and spices laid out neatly on a white marbled surface. At the bottom left, there is a white tray filled with raw red meat strips. Above it, from left to right, there are three small white bowls with bright green sliced bell peppers, white onion slices, and red bell pepper slices. To the right of these bowls, a larger empty white bowl sits. Below these bowls, small white ramekins contain different spices: one with light brown powder, one with white powder, one with black pepper, one with a darker brown powder, and one with a dark liquid sauce. Two small red cubes are placed between the bowls of veggies and spices. photo taken with an iphone --ar 4:5 --v 7

These ingredients come together simply yet thoughtfully to create a symphony of flavors and textures. Each component plays a vital role from the tender beef strips to the bold seasonings that balance sweetness, spice, and umami perfectly.

2 lbs. beef strips: Choose a cut like sirloin for tenderness and great beef flavor.
1 green bell pepper (sliced thick): Adds freshness and a slight crunch that contrasts the tender meat.
1 red bell pepper (sliced thick): Delivers sweetness and vibrant color to the dish.
1 white onion (sliced): Builds a base of savory sweetness as it softens during cooking.
½ cup water: Creates the perfect broth base to dissolve the bouillon cubes.
2 beef bouillon cubes: Concentrated flavor that deepens the beefy taste of the sauce.
3 Tbsp. soy sauce: Brings an umami richness and saltiness.
1 tsp. Worcestershire sauce: Adds a subtle tang and complexity.
¼ tsp. ground ginger: Lends a warm, slightly spicy undertone.
¼ tsp. garlic powder: Provides aromatic depth without overpowering the dish.
½ tsp. black pepper: Offers mild heat and flavor sharpness.
2 tsp. brown sugar (or honey/white sugar): Balances savory with a gentle sweetness.
1 Tbsp. cornstarch: Thickens the sauce to luscious perfection.
¼ tsp. red pepper flakes (optional): For those who love a little kick.

How to Make Slow Cooker Pepper Steak Recipe

Step 1: Prepare the Broth Base

Start by combining the water and beef bouillon cubes in a small microwavable bowl. Heat for about 30 seconds just until the cubes dissolve fully, stirring well with a spoon or whisk. This forms a flavorful beef broth that sets the foundation for the sauce, boosting its savory depth. If you don’t use a microwave, simply bring the water to a boil on the stove and dissolve the bouillon there.

Step 2: Mix the Sauce

Into the warm broth, whisk in the soy sauce, Worcestershire sauce, ground ginger, garlic powder, black pepper, brown sugar, and cornstarch. Adding the optional red pepper flakes here will introduce a subtle heat to complement the dish’s sweet and savory notes. Whisk everything until smooth—the cornstarch is crucial here because it will transform this mixture into a glossy, thick sauce that clings perfectly to the beef and veggies.

Step 3: Layer Your Ingredients

Pour the sauce into your slow cooker, then add the beef strips, green and red bell peppers, and sliced white onion right on top of the sauce. By layering this way, the beef will absorb the sauce’s flavor as it cooks, while the peppers and onions soften just enough to maintain a nice bite without turning mushy.

Step 4: Slow Cook to Perfection

Cover your slow cooker and set it on low for 5 hours. This slow and low approach gently tenderizes the beef and allows all those flavors to meld beautifully, resulting in a dish bursting with warmth and richness. Patience here rewards you with melt-in-your-mouth steak and perfectly cooked vegetables.

How to Serve Slow Cooker Pepper Steak Recipe

A close-up view inside a black slow cooker shows a stew with three main layers: the bottom layer is a light brown, slightly thick broth; the middle layer features soft, thin strips of light brown meat scattered throughout; the top layer includes bright chunks of red and green bell peppers mixed with translucent white onion pieces, all coated in the broth. The slow cooker is placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To elevate your Slow Cooker Pepper Steak Recipe right at the table, consider fresh garnishes. Chopped green onions add a crisp, slightly sharp freshness, while a sprinkle of toasted sesame seeds provides a subtle nutty crunch that complements the sauce. If you’re feeling adventurous, a few sprigs of fresh cilantro or a squeeze of lime juice can brighten the whole dish beautifully.

Side Dishes

This pepper steak pairs wonderfully with simple sides that soak up the delicious sauce. Fluffy steamed white or brown rice is a classic choice, offering a comforting base. Alternatively, try buttery mashed potatoes or roasted baby potatoes for a heartier option. For a lighter touch, steamed broccoli or snap peas add a fresh contrast and extra color to your plate.

Creative Ways to Present

Give this dish a fun twist by serving it over quinoa or cauliflower rice for a nutrient boost. You could also spoon the pepper steak onto freshly toasted hoagie rolls for savory sandwiches perfect for casual dinners. For a family-style meal, transfer the slow cooker contents to a large rustic serving dish and let everyone help themselves, making for a communal and cozy dining experience.

Make Ahead and Storage

Storing Leftovers

After digging in, you might have leftovers—and lucky you! Store any extra Slow Cooker Pepper Steak Recipe in an airtight container in the refrigerator where it will stay fresh for up to 3 days. The flavors meld even more after resting, so the next-day leftovers can be just as delicious.

Freezing

This dish freezes beautifully if you want to save portions for later. Portion out the steak and vegetables with sauce into freezer-safe containers or heavy-duty freezer bags, removing as much air as possible to prevent freezer burn. It keeps well for up to 3 months, making it an excellent option for meal prep or surprise busy days.

Reheating

When you’re ready to enjoy your leftover Slow Cooker Pepper Steak Recipe, reheat it gently on the stovetop over medium heat or in the microwave. Stir occasionally to warm it evenly and add a splash of water or broth if the sauce has thickened too much. This helps revive that luscious sauce texture and gives you that fresh-from-the-crockpot feeling all over again.

FAQs

Can I use other types of beef for this recipe?

Absolutely! While sirloin or flank steak strips work beautifully, you can also use other tender cuts like skirt steak. Just make sure to slice the beef thinly against the grain for the best tenderness.

Is it possible to make this recipe in under 5 hours?

Because slow cooking is key to tenderizing the beef and melding flavors, shortening cook time is not ideal. However, if you’re short on time, you can try cooking it on high for 2.5 to 3 hours, but check frequently to avoid overcooking the vegetables.

What can I substitute if I don’t have Worcestershire sauce?

If you don’t have Worcestershire sauce on hand, a combination of soy sauce and a splash of vinegar or lemon juice can mimic a similar tangy depth. Fish sauce or balsamic vinegar may also work in small amounts.

Can I add other vegetables to this Slow Cooker Pepper Steak Recipe?

Yes! Mushrooms, snap peas, or even carrots make great additions. Just add them at the beginning for longer cooking veggies or in the last hour for quicker-cooking ones to maintain texture.

How spicy is this dish if I add the red pepper flakes?

The red pepper flakes add a gentle warming heat—not overpowering but enough to give the dish a bit of a kick. You can always adjust the amount or omit them if you prefer a milder flavor.

Final Thoughts

This Slow Cooker Pepper Steak Recipe is truly a comforting classic that brings joy with minimal effort. Whether you’re craving a cozy weeknight dinner or seeking an easy meal to prep ahead, this recipe shines every time. I can’t wait for you to taste that tender beef and vibrant pepper combo soaking in the rich sauce—it just might become your new go-to meal!