Name: Slow Cooker Pepper Steak Recipe
Prep time: 15 min
Cook time: 5 h
Total time: 5 h 15 min
Cuisine: American-Asian Fusion
Ingredients: 2 lbs flank steak, sliced into thin strips; 1 large green bell pepper, sliced thick; 1 large red bell pepper, sliced thick; 1 large yellow bell pepper, sliced thick; 1 large onion, sliced thick; 4 garlic cloves, minced; 1 teaspoon ginger, peeled and minced; 1 cup beef broth; ¼ cup soy sauce; 2 tablespoons cornstarch; 2 teaspoons white sugar (or to taste); ½ teaspoon red pepper flakes; Salt and pepper, to taste; Fresh green onions, sliced, for topping; Sesame seeds, for topping

Jump to Recipe· 4.3 from 9 reviews

I absolutely love sharing this Slow Cooker Pepper Steak Recipe with friends and family because it combines incredibly tender beef with a colorful medley of bell peppers, all simmered slowly to develop rich, savory flavors that just melt in your mouth. It’s one of those dishes that feels both comforting and exciting at the same time, perfect for when I want a hearty dinner without spending hours in the kitchen. The slow cooker does all the work while I get to enjoy the irresistible aroma filling my home, and the results are always impressive and delicious.

Why You’ll Love This Slow Cooker Pepper Steak Recipe

What makes this Slow Cooker Pepper Steak Recipe so special to me is the harmony of flavors it achieves. The beef becomes incredibly tender, soaking up the savory beef broth and soy sauce, while the trio of green, red, and yellow bell peppers adds a wonderful sweetness along with vibrant color. The garlic, ginger, and just a hint of red pepper flakes bring warmth and depth without overpowering the dish. Each bite feels perfectly balanced and deeply satisfying, which always makes me smile.

Another thing I adore about this recipe is how ridiculously easy it is to prepare. After slicing the steak and veggies, you just throw everything into the slow cooker, mix up a simple sauce, and pour it over. From there, you’re hands-off for several hours, which frees me up to relax or prepare other parts of the meal. It’s excellent for busy weeknights, casual family dinners, or even a laid-back weekend meal when I want something comforting but fuss-free. The long, slow cooking really elevates ordinary ingredients into something memorable.

Ingredients You’ll Need

A black round slow cooker filled with one layer of raw, thin strips of red meat evenly spread inside. The meat has some white streaks of fat showing texture. The slow cooker is set on a white marbled surface, giving a clean and bright background. photo taken with an iphone --ar 4:5 --v 7

These ingredients are straightforward and essential, each playing an important role in creating the delicious flavor, texture, and colorful presentation I love about this Slow Cooker Pepper Steak Recipe.

2 lbs flank steak (sliced into thin strips): I find flank steak great because it becomes tender over slow cooking and soaks up all the sauce beautifully.
1 large green bell pepper (sliced thick): Adds a fresh, slightly bitter crunch that brightens the dish.
1 large red bell pepper (sliced thick): Brings a sweet juiciness that balances the savory meat.
1 large yellow bell pepper (sliced thick): Adds vibrant color and mild sweetness.
1 large onion (sliced thick): For sweetness and robust flavor that softens into the sauce.
4 cloves garlic (minced): Garlic adds its signature warmth and depth of flavor.
1 teaspoon ginger (peeled and minced): I recommend fresh ginger for a subtle zing and aromatic lift.
1 cup beef broth: Creates a savory, rich base for the sauce.
¼ cup soy sauce: Adds saltiness and umami to bring everything together.
2 tablespoons cornstarch: Helps thicken the sauce perfectly.
2 teaspoons white sugar (or to taste): Balances the salty and savory notes with a touch of sweetness.
½ teaspoon red pepper flakes: Gives a little gentle heat without overwhelming the dish.
Salt and pepper (to taste): Essential seasonings to enhance all the flavors.
Fresh green onions (for topping): Adds freshness and a pop of color.
Sesame seeds (for topping): For a nutty crunch that finishes the dish beautifully.

Directions

Step 1: Begin by thinly slicing the flank steak into strips; this helps the meat cook evenly and become wonderfully tender during the slow cooking process.

Step 2: Slice your green, red, and yellow bell peppers, along with the onion, into thick strips to maintain a nice texture after slow cooking, and mince the garlic and fresh ginger to release their flavors.

Step 3: Place the sliced flank steak into the bottom of a 6-quart slow cooker, then layer the sliced bell peppers, onion, garlic, and ginger on top, ensuring everything is evenly distributed.

Step 4: In a separate bowl, whisk together the beef broth, soy sauce, cornstarch, sugar, red pepper flakes, salt, and pepper until smooth and combined; this mixture will create a luscious sauce.

Step 5: Pour the sauce evenly over the beef and vegetables in the slow cooker. Cover with the lid and set it to cook on low for 5 to 7 hours, or on high for 2 ½ to 3 ½ hours—this slow simmer allows the flavors to meld beautifully.

Step 6: Before serving, give everything a good stir to mix the sauce and ingredients. Garnish with chopped fresh green onions and a sprinkle of sesame seeds for that irresistible final touch.

Step 7: Serve the pepper steak hot over steamed rice or your favorite noodles for a complete meal packed with flavor and texture.

Servings and Timing

This Slow Cooker Pepper Steak Recipe makes about 6 generous servings, perfect for feeding a family or having leftovers for lunch the next day. The prep time is roughly 15 minutes, which includes slicing the meat and veggies, mixing the sauce, and assembling everything in the slow cooker. The cook time is flexible—5 to 7 hours on low or 2 ½ to 3 ½ hours on high—depending on your schedule. There is no resting time needed once it’s cooked, other than a quick stir before serving. Overall, this meal is perfect when you want a hands-off cooking experience without sacrificing flavor or quality.

How to Serve This Slow Cooker Pepper Steak Recipe

The image shows a white round plate filled with three layers of food on a white marbled surface. The bottom layer is a bed of cooked white rice. Above the rice, there is a mix of sliced red and yellow bell peppers and green leafy vegetables, adding bright colors and a fresh look. The top layer consists of several pieces of brown cooked meat covered with sesame seeds and red chili flakes, some pieces glistening as one piece is lifted by a silver fork held by a woman's hand. In the background, there is a blurred black slow cooker with a silver band. photo taken with an iphone --ar 4:5 --v 7

When I serve this Slow Cooker Pepper Steak Recipe, I love pairing it with fluffy steamed white or jasmine rice because it soaks up all the delicious sauce perfectly. If I want something a bit more substantial, I’ll serve it over egg noodles or even garlic butter noodles to add a silky richness. For a lighter option, steamed or roasted cauliflower rice works beautifully as well, especially if you’re aiming for a low-carb meal.

To make the presentation extra special, I sprinkle chopped green onions and toasted sesame seeds on top. Sometimes I add a little drizzle of toasted sesame oil just before serving for an added layer of aroma and flavor. I like to serve it hot straight from the slow cooker, which keeps each bite cozy and comforting. Depending on the occasion, I might plate it with a garnish of fresh cilantro or thinly sliced fresh chili for a bit of heat and color contrast.

For beverages, I find a chilled glass of dry Riesling or a light, fruity Pinot Noir pairs wonderfully with the savory and slightly sweet flavors of the dish. If you prefer cocktails, a refreshing ginger mojito or a classic margarita balances this meal nicely. Non-alcoholic options like iced green tea or sparkling water with lemon also complement it without overpowering those rich, layered flavors. This dish shines at family dinners, casual gatherings, and even cozy weeknight meals where you want something both easy and special.

Variations

I like experimenting with this Slow Cooker Pepper Steak Recipe by swapping out ingredients or adjusting flavors to suit different preferences. For example, if flank steak isn’t available, sirloin or skirt steak work wonderfully as alternatives since they also become tender and soak up the sauce nicely. If you want a leaner option, lean beef strips can be used, but be mindful not to overcook them in the slow cooker to avoid dryness.

If you have dietary restrictions, this recipe is easy to adapt. By using tamari or a gluten-free soy sauce, you can easily make it gluten-free—just double-check the broth you’re using. For a vegan take, while it won’t be a pepper steak anymore, you can swap the beef for thick slices of firm tofu or seitan and use vegetable broth instead; the same sauce and veggies will still shine.

For a flavor twist, try adding a splash of hoisin sauce or oyster sauce to the broth mixture to give it a sweeter and more complex profile. You can also increase or decrease the red pepper flakes based on how much heat you like. If you want to speed up the process, this recipe can be started on the stovetop by searing the steak strips and then simmering with the sauce and veggies for about 30 minutes until thickened and tender, though you’ll miss out on that slow-cooked tenderness that makes this dish so irresistible.

Storage and Reheating

Storing Leftovers

I usually transfer any leftovers of this Slow Cooker Pepper Steak Recipe into airtight containers to keep them fresh. Glass containers with tight-fitting lids work best because they don’t absorb flavors and are easy to reheat in. Stored this way, the leftovers will last up to 3 to 4 days in the refrigerator. Before sealing, I make sure the food has cooled to room temperature to prevent condensation, which can lead to sogginess or spoilage.

Freezing

This pepper steak freezes quite well if you want to save some for later. I portion it into freezer-safe containers or heavy-duty zip-top bags, removing as much air as possible to prevent freezer burn. When properly stored, it maintains quality for up to 2 months. To freeze, allow the dish to cool completely, then label containers with the date. When ready to use, it’s best to thaw overnight in the fridge before reheating to maintain texture and flavor.

Reheating

For the best results when reheating, I prefer gently warming the pepper steak in a covered skillet over medium-low heat, stirring occasionally to re-incorporate the sauce and prevent sticking. This helps retain the meat’s tenderness and keeps the vegetables from getting mushy. Alternatively, reheating in the microwave works fine—cover the dish to keep moisture in and heat in short bursts, stirring between each to heat evenly. Avoid overheating, as it can dry out the beef and dull the vibrant flavors.

FAQs

Can I use a different cut of beef for this Slow Cooker Pepper Steak Recipe?

Absolutely! While flank steak is my first choice because it becomes tender and flavorful, you can also use sirloin, skirt steak, or even chuck roast cut into strips. Just be mindful that tougher cuts may need longer cooking times to become tender, and leaner cuts could dry out if overcooked.

Is it possible to make this recipe gluten-free?

Yes, it’s easy to make this gluten-free by using tamari or a certified gluten-free soy sauce instead of regular soy sauce. Also, double-check that your beef broth doesn’t contain any gluten-containing ingredients. The rest of the ingredients are naturally gluten-free.

Can I prepare this dish in advance?

Definitely. Because it’s a slow cooker recipe, you can prep the ingredients the night before—slice the meat and veggies, mix the sauce, and store everything in the fridge. Then, simply layer them in the slow cooker the next day and start cooking. This makes it super convenient for busy schedules.

What should I serve with Slow Cooker Pepper Steak?

I love serving this dish over steamed rice or noodles to soak up the delicious sauce. For something lighter, cauliflower rice works well too. You can also pair it with stir-fried veggies or a crisp green salad for added freshness and texture.

Can I add more vegetables to the recipe?

Yes! Feel free to add mushrooms, snap peas, broccoli florets, or baby corn for extra variety and nutrition. Just keep in mind that some vegetables cook faster than others, so you might want to add those closer to the end of cooking time to keep their texture.

Conclusion

I hope you feel inspired to try this Slow Cooker Pepper Steak Recipe soon because it’s truly one of my favorite comfort meals that delivers on flavor, ease, and satisfaction every single time. The combination of tender beef, vibrant peppers, and savory sauce is a crowd-pleaser that I’ll keep coming back to again and again. Trust me, once you make it, it’ll become a go-to recipe in your kitchen too!