Name: Slow Cooker Pepper Steak Recipe
Prep time: 15 min
Cook time: 5 h
Total time: 5 h 15 min
Cuisine: American-Chinese
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 cloves garlic, 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; Sesame seeds

I absolutely adore this Slow Cooker Pepper Steak Recipe because it delivers a hearty, flavorful meal with minimal fuss. Tender strips of flank steak slowly mingle with colorful bell peppers, onion, and a savory sauce that’s bursting with Asian-inspired goodness. It’s one of those dishes that feels like a warm hug on a plate, and because it’s made in the slow cooker, it’s perfect for busy days when I want dinner ready without standing over the stove. Every time I make it, I’m reminded how such simple ingredients can come together to create something truly special.

Why You'll Love This Slow Cooker Pepper Steak Recipe

What really excites me about this Slow Cooker Pepper Steak Recipe is the deep, comforting flavor it develops as it gently cooks for hours. The combination of soy sauce, ginger, and garlic perfectly complements the juicy steak and vibrant bell peppers. The subtle heat from the red pepper flakes adds just enough kick to keep things interesting without overpowering the dish. I love how the meat becomes melt-in-your-mouth tender, and the vegetables soften just enough to soak up all those rich flavors.

Another reason I’m always eager to recommend this recipe is how easy it is to prepare. I can slice everything up in under 10 minutes, toss it all into the slow cooker, and then just walk away. No babysitting the stove or complicated steps—just pure convenience. It’s a great weeknight go-to or a fantastic dish for when I want to impress guests without spending hours in the kitchen.

I’ve also found this dish to be incredibly versatile when it comes to serving occasions. Whether I’m hosting a casual family dinner, meal prepping for the week, or bringing something to a potluck, this pepper steak fits right in. It’s hearty enough to feel like a main event but also pairs beautifully with a wide variety of sides to suit any mood or celebration.

Ingredients You'll Need

A round black slow cooker filled with one even layer of raw beef strips, showing bright red color and white marbling throughout the meat, sitting on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

These simple, fresh ingredients form the backbone of this Slow Cooker Pepper Steak Recipe. Each one brings its own unique touch—from the tender texture of flank steak to the sweet crunch of bell peppers and the aromatic zing that ginger and garlic provide. Together, they create a harmonious balance of color, flavor, and texture that makes this dish so irresistible.

TIP : You'll find the full list of ingredients and measurements in the recipe card below

Flank steak: Thinly sliced for quick, even cooking and tender results in the slow cooker.
Green, red, and yellow bell peppers: They add vibrant color and a slightly sweet crunch that balances the savory meat.
Onion: Sliced thick to soften perfectly and impart a natural sweetness during cooking.

Garlic cloves: Minced to infuse the dish with rich, aromatic depth.
Fresh ginger: Adds a brilliant warm and zesty note that brightens up the flavor.
Beef broth: Creates a flavorful base for the sauce that keeps the meat juicy.

Soy sauce: The salty, umami punch that defines the savory profile.
Cornstarch: Thickens the sauce to a glossy finish that clings beautifully to every bite.
White sugar: A touch of sweetness to balance the salty and spicy elements.

Red pepper flakes: Just enough to add a gentle heat, customizable to your heat preference.
Salt and pepper: To taste, enhancing all the natural flavors.
Fresh green onions and sesame seeds: For garnish, adding freshness and a lovely finishing crunch.

Directions

Step 1: Begin by slicing your flank steak into thin strips. I like to slice against the grain for the most tender texture. Then, place the beef strips into a 6-quart slow cooker, spreading them evenly.

Step 2: Next, prep your vegetables. Slice the bell peppers and onion into thick strips, and mince the garlic and ginger. Layer all the veggies on top of the beef inside the slow cooker.

Step 3: In a medium bowl, whisk together the beef broth, soy sauce, cornstarch, sugar, red pepper flakes, salt, and pepper until smooth. Pour this flavorful mixture evenly over the beef and vegetables.

Step 4: Cover your slow cooker and set it to cook on low for 5 to 7 hours or on high for 2 ½ to 3 ½ hours. The longer cooking time helps develop deep flavors and ensures tender steak.

Step 5: When the cooking time is up, give the stew a good stir to mix the sauce and ingredients together. Serve it hot, topped with freshly sliced green onions and a sprinkle of sesame seeds. I love pairing it with steamed rice or noodles to soak up every bit of that luscious sauce.

Servings and Timing

This Slow Cooker Pepper Steak Recipe comfortably serves 6 people, making it perfect for family dinners or meal prepping for the week. The prep time is delightfully brief—around 15 minutes to cut and combine everything. Cook time depends on your slow cooker setting: 5 to 7 hours on low or 2 ½ to 3 ½ hours on high. There’s no additional resting time needed, so you can serve it straight from the slow cooker while it's bubbling hot and fresh.

How to Serve This Slow Cooker Pepper Steak Recipe

The image shows a close-up of a white plate filled with a dish that has three main layers. The bottom layer is white rice with a soft texture spread across the plate. On top of the rice, there is a colorful stir-fry mix with thick slices of red and yellow bell peppers and green onion pieces. The top layer features several pieces of brown, cooked meat cut into rectangular shapes, all sprinkled with white sesame seeds and red chili flakes. A silver fork holds one piece of meat above the plate, highlighting its glistening, saucy surface. The setting includes a white marbled surface under the plate and a black slow cooker in the background. photo taken with an iphone --ar 4:5 --v 7

When I serve this Slow Cooker Pepper Steak Recipe, I love to keep things simple but satisfying by pairing it with fluffy steamed jasmine or basmati rice. The rice acts like a sponge, soaking up all the delicious sauce, which makes each bite incredibly flavorful. For a bit of texture contrast, sometimes I also serve it alongside garlic fried rice or buttered egg noodles, which add a comforting, creamy element to the meal.

As for garnishing, the sliced green onions and toasted sesame seeds add such a nice pop of color and a subtle crunch that really elevate the presentation. I sometimes sprinkle a little extra cracked black pepper on top to highlight the peppery theme of the dish. Serving it in wide, shallow bowls really showcases the vibrant colors of the peppers and makes the meal feel cozy and inviting.

For beverages, I often reach for a light red wine like Pinot Noir or a chilled Riesling to complement the dish’s savory and slightly sweet profile. If you prefer non-alcoholic drinks, a ginger iced tea or sparkling water with a slice of lime works wonderfully to cleanse the palate. This dish is fantastic for weeknight dinners but also shines at family gatherings or casual dinner parties where comfort and good flavors matter most. I always recommend serving it hot to enjoy every nuance of the sauce and tenderness of the steak.

Variations

I love experimenting with this Slow Cooker Pepper Steak Recipe by switching up ingredients or tailoring it to specific dietary needs. For example, if you prefer a leaner cut of meat, sirloin strips can be a great substitute for flank steak, although I find flank works best for that tender, juicy texture after slow cooking. For a gluten-free version, just use tamari instead of soy sauce, and ensure your beef broth is gluten-free as well.

If you’re looking to add a vegetarian twist, I’ve had great success swapping the flank steak for firm tofu or seitan, along with vegetable broth instead of beef broth. The rest of the ingredients stay the same, and it still results in a rich, satisfying dish. For additional flavor flair, try adding sliced mushrooms or water chestnuts for an extra layer of texture and earthiness.

Cooking methods can also vary—if you’re short on time, this recipe can be adapted for the stovetop by simmering gently in a covered pan for about an hour, stirring often to prevent sticking. Or use a pressure cooker to reduce cooking time significantly while keeping everything tender and flavorful. Each method offers a slightly different experience, but the core Slow Cooker Pepper Steak Recipe taste shines through every time.

Storage and Reheating

Storing Leftovers

After enjoying this Slow Cooker Pepper Steak Recipe, I store leftovers in an airtight container and keep them in the refrigerator. I find glass or BPA-free plastic containers work best for maintaining freshness. The leftovers usually stay delicious and safe to eat for up to 4 days. The veggies may soften a bit more after storing, but the flavors remain wonderfully rich.

Freezing

This pepper steak freezes beautifully, which is great if you want to meal prep or save some for later. I portion out the leftovers into freezer-safe containers or heavy-duty freezer bags, removing as much air as possible before sealing. Make sure to label your containers with the date, and enjoy the frozen meal within 2 to 3 months for best flavor and texture. When you’re ready, thaw overnight in the refrigerator for even reheating.

Reheating

To reheat, I prefer warming the pepper steak gently on the stovetop over medium-low heat, stirring occasionally to prevent sticking and to re-distribute the sauce evenly. Adding a splash of water or broth can help loosen the sauce if it thickened too much in the fridge. Microwave reheating works too, just be sure to cover it to retain moisture and heat in short bursts to avoid drying out the meat. Avoid overheating, which can make the steak tough; warm it just until steaming hot for best results.

FAQs

Can I use other cuts of beef for this Slow Cooker Pepper Steak Recipe?

Absolutely! While flank steak is ideal for tenderness and flavor, you can substitute with sirloin, skirt steak, or even chuck roast cut into strips. Just be mindful that cook times might vary slightly depending on the cut’s thickness and fat content.

Is this recipe gluten-free?

The recipe as written contains soy sauce, which usually has gluten. To make it gluten-free, simply replace regular soy sauce with tamari or another gluten-free soy sauce alternative. Also, check that your beef broth is gluten-free.

Can I make this Slow Cooker Pepper Steak Recipe spicier?

Definitely! Feel free to increase the amount of red pepper flakes or add a fresh chopped chili pepper for extra heat. Remember to adjust gradually so you don’t overpower the balance of flavors.

What side dishes go well with pepper steak?

I love serving this dish with steamed rice, stir-fried noodles, or even a simple quinoa salad. Steamed or roasted veggies like broccoli or snap peas also make nice, fresh accompaniments that complement the rich sauce.

Can I prepare this recipe in advance?

Yes! You can chop and prep all the ingredients the day before, storing them in the fridge separately. When you’re ready to cook, just layer everything in the slow cooker as directed. This makes meal prep super convenient for busy days.

Conclusion

I hope you give this Slow Cooker Pepper Steak Recipe a try soon because it’s truly become one of my favorite comfort meals to share. It’s easy to make, full of incredible flavor, and perfect for any day when you want something warm and satisfying waiting for you at dinnertime. Trust me, this recipe will quickly find its way onto your rotation just like it did in mine. Happy cooking!