The Ultimate Crockpot Pepper Steak: Easy Weeknight Dinner Perfection

Welcome to your new favorite weeknight staple: Crockpot Pepper Steak. This incredibly flavorful and tender dish transforms simple ingredients into a gourmet-tasting meal with minimal effort, thanks to the magic of slow cooking. Forget tedious stovetop stirring; this recipe delivers rich, savory gravy and perfectly cooked steak and peppers right in your slow cooker.

Why You Will Love This Recipe

This Crockpot Pepper Steak recipe is the definition of effortless weeknight cooking. You simply brown the steak, dump everything into the slow cooker, and let it work its magic for several hours. The slow cooking process ensures the flank steak becomes fork-tender, absorbing all the delicious flavors from the soy sauce, beef broth, and vegetables. It requires very little hands-on time, making it perfect for busy families or anyone looking for a hearty, satisfying dinner without the fuss.

Ingredients

• 2 pounds flank steak or sirloin steak, thinly sliced against the grain
• 1 tablespoon olive oil (for searing)
• 1 large onion, sliced
• 1 green bell pepper, sliced
• 1 red bell pepper, sliced
• 1/2 cup soy sauce (low sodium preferred)
• 1 cup beef broth
• 2 tablespoons Worcestershire sauce
• 2 tablespoons brown sugar (packed)
• 1 teaspoon garlic powder
• 1/2 teaspoon ground ginger
• 1/4 cup cornstarch (for thickening)
• 1/4 cup cold water (for cornstarch slurry)

Step-by-Step Instructions

1. Prepare the Steak: Slice the flank steak thinly against the grain into bite-sized pieces. Pat the steak dry with paper towels.
2. Sear the Steak (Optional but Recommended): Heat the olive oil in a large skillet over medium-high heat. Working in batches if necessary, quickly sear the slices of steak until lightly browned on all sides. This step adds a depth of flavor that boiling alone won’t achieve. Remove the seared steak and place it directly into the basin of your slow cooker.
3. Add Aromatics and Liquid: Add the sliced onions, green bell pepper, and red bell pepper over the steak in the slow cooker. In a separate bowl, whisk together the soy sauce, beef broth, Worcestershire sauce, brown sugar, garlic powder, and ground ginger. Pour this mixture evenly over the steak and vegetables.
4. Slow Cook: Cover the crockpot and cook on LOW for 6 to 8 hours, or on HIGH for 3 to 4 hours, until the steak is very tender.
5. Thicken the Sauce: About 30 minutes before serving, prepare the slurry. In a small bowl, whisk together the cornstarch and cold water until completely smooth. Pour the slurry into the slow cooker, stirring gently to combine it with the liquid.
6. Finish Cooking: Replace the lid and allow the mixture to cook on HIGH for another 15 to 20 minutes, or until the sauce has thickened to your desired consistency. Taste and adjust seasonings (add more soy sauce for saltiness or pepper for heat, if desired). Serve hot.

Expert Tips / Pro Tips

• Slicing Against the Grain is Key: For the most tender Crockpot Pepper Steak, ensure you slice the steak against the natural muscle fibers. This shortens the fibers, making the meat much easier to chew after slow cooking.
• Do Not Skip Searing: While this is a slow cooker recipe, taking the extra 5–10 minutes to quickly sear the meat before adding it to the pot develops the Maillard reaction, adding crucial savory notes to the final sauce.
• Thickening Slurry Timing: Always wait until the end of the cooking time to add the cornstarch slurry. If you add it at the beginning, the cornstarch can break down into liquid during the long cooking process, leaving you with a thin sauce.
• Use Fresh Vegetables: While frozen peppers work in a pinch, fresh, crisp bell peppers and onions hold their shape slightly better during the long cooking time, providing a better texture contrast to the tender steak.

Variations & Substitutions

• Different Beef Cuts: If flank steak is unavailable, sirloin steak works perfectly. You can also use trimmed top round roast, sliced thin.
• Spice Level: For a spicier dish, add 1/2 teaspoon of red pepper flakes either with the spices or when thickening the sauce.
• Vegetable Additions: Feel free to toss in sliced mushrooms, carrots, or snow peas during the last hour of cooking for added texture and nutrients.
• Flavor Boost: A small splash (about 1 teaspoon) of toasted sesame oil added right before serving provides an authentic Asian-inspired aroma.

Serving Suggestions

Crockpot Pepper Steak is traditionally served over a bed of fluffy white rice, which perfectly soaks up the rich, savory gravy. However, for a lower-carb option, serve it over cauliflower rice or alongside steamed broccoli florets. For an enhanced meal experience, pair it with an appetizer of Asian-inspired egg rolls or a refreshing seaweed salad.

Storage, Freezing & Reheating

Storage: Store leftovers in an airtight container in the refrigerator for up to 3 to 4 days. The flavor actually deepens overnight! Ensure the sauce has thickened before refrigerating.

Freezing: This dish freezes exceptionally well. Cool the pepper steak completely, then transfer it to a freezer-safe, airtight container or heavy-duty freezer bag, leaving about an inch of headspace if using a container. Freeze for up to 3 months. Note that bell peppers may become slightly softer after thawing.

Reheating: To reheat on the stovetop, place leftovers in a saucepan over medium-low heat, stirring occasionally until heated through. If the sauce seems too thick, add a tablespoon or two of beef broth or water. In the microwave, heat in 60-second intervals, stirring between each interval until hot.

Nutrition Information

Please note: Nutritional values are estimates and will vary based on specific ingredients and portion sizes used. This calculation assumes serving over 1 cup of cooked white rice per person.

FAQ

What is the best cut of beef for Crockpot Pepper Steak?

Flank steak is traditionally the best choice because it is lean and slices well. If you cook it properly in the slow cooker, it becomes extremely tender. Sirloin steak is an excellent, slightly more tender substitute.

Do I need to sear the steak if I am slow cooking it?

While technically optional, searing the steak before placing it in the slow cooker is strongly recommended. Searing locks in flavor through browning (the Maillard reaction), which adds complexity to the final sauce that you cannot achieve just by boiling the meat in liquid.

How do I prevent the sauce from being too watery?

The sauce thickens at the end using a cornstarch slurry (cornstarch mixed with cold water). Whisk this slurry into the liquid during the last 20–30 minutes of cooking on high heat. Never add cornstarch at the beginning of the slow-cooking cycle, as it will break down.

Can I use a different color of bell pepper?

Yes! You can use yellow or orange bell peppers, or even a mix of all four colors. The red and green peppers offer the most authentic flavor profile, but any color will work well to complement the savory beef.

Crockpot Pepper Steak

Tender slices of steak simmered slowly in a rich sauce with bell peppers and onions, perfect for a hearty and easy weeknight dinner.

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Prep Time 15 minutes mins

Cook Time 7 hours hrs

Total Time 7 hours hrs 15 minutes mins

Servings: 6 servings

Course: Dinner, Main Course

Cuisine: American

Calories: 410

Ingredients Method Notes

Ingredients

  

For the Steak and Vegetables

• 2.5 lbs Beef Sirloin Steak Cut into bite-sized strips
• 1 Large Yellow Onion Sliced
• 2 Green Bell Peppers Sliced
• 1 Red Bell Pepper Sliced

For the Sauce

• 1 can (10.5 oz) Condensed Cream of Mushroom Soup
• 1 cup Beef Broth
• 1 tsp Worcestershire Sauce
• 1 tbsp Soy Sauce Low Sodium preferred
• 1 tsp Garlic Powder
• 1 tsp Dried Basil
• 2 tbsp Cornstarch For thickening
• 2 tbsp Water Cold

Method

 

Instructions

1. Place the cut steak strips into the bottom of a 6-quart or larger slow cooker.
2. Distribute the sliced onions and bell peppers evenly over the top of the steak.
3. In a separate medium bowl, whisk together the cream of mushroom soup, beef broth, Worcestershire sauce, soy sauce, garlic powder, and dried basil until smooth.
4. Pour the sauce mixture evenly over the steak and vegetables in the slow cooker. Do not stir.
5. Cover and cook on LOW for 7 hours or on HIGH for 3.5 hours, or until the steak is very tender.
6. About 15 minutes before serving, prepare the slurry by whisking the cornstarch and cold water together in a small bowl until smooth.
7. Stir the cornstarch slurry into the slow cooker. Cover and cook on HIGH for the final 15 minutes, stirring occasionally, until the sauce has thickened to your desired consistency.
8. Serve hot over rice, egg noodles, or mashed potatoes.

Notes

For a richer flavor, you can sear the steak strips in a hot skillet with a little oil for 2-3 minutes per side before adding them to the slow cooker. This step is optional but enhances browning.