Easy Slow Cooker Pepper Steak with Rich Savory Sauce Tips, FAQ & printable recipe

Tips for success

To elevate the flavor of the dish, consider using a high-quality savory brown sauce with deep umami notes. The rich sauce releases a vibrant, savory bite that pairs beautifully with the sweet bell peppers and onions, creating a balanced flavor profile.

If a homemade sauce is preferred, whisking soy sauce, beef broth, and a touch of sweetener beforehand works beautifully.

If a slightly crisper texture is preferred for the vegetables, they can be added during the last two hours of cooking instead of at the very beginning.

This modification prevents them from softening too much, retaining a pleasant bite and a brighter color that contrasts beautifully with the dark, glossy beef.

Variations

• Spicy Slow Cooker Pepper Steak: Add one teaspoon of crushed red pepper flakes or sriracha to the savory sauce mixture before pouring it over the beef.
• Sesame Pepper Steak: Drizzle with toasted sesame oil and sprinkle with toasted sesame seeds just before serving for a rich, nutty finish.

Storage and make-ahead

Fridge

Store leftovers in an airtight container in the refrigerator for up to 3 to 4 days.

Freezer

Freeze the cooked pepper steak in a freezer-safe container or heavy-duty freezer bag for up to 2 to 3 months.

Reheat

Reheat gently in a saucepan over medium-low heat, stirring occasionally, or in the microwave in 30-second bursts until steaming hot throughout.

Allow the pepper steak to cool down to room temperature for no more than two hours before storing. Place the leftovers in an airtight container, ensuring the beef is fully submerged in the savory sauce to prevent it from drying out.

Store the container in the refrigerator. The flavors will continue to develop and meld overnight, making the leftovers taste even better the following day.

This recipe is incredibly convenient for meal prep. The beef, bell peppers, and onions can be sliced up to 24 hours in advance. Store the sliced ingredients in separate airtight containers in the refrigerator.

In the morning, simply place the prepared ingredients into the slow cooker, pour the savory brown sauce over them, and set the timer.

Serving ideas

This slow-cooker pepper steak is traditionally served over a generous bed of warm, fluffy white or brown rice, which acts as a perfect sponge for absorbing the rich, savory gravy. For an alternative base, cauliflower rice or steamed broccoli florets pair wonderfully with the glossy sauce.

To complete the meal, serve the dish alongside a simple cucumber salad dressed with rice vinegar or some lightly sautéed snap peas. The crisp, refreshing texture of the side dishes provides a delightful contrast to the tender, slow-cooked beef and rich, warm glaze, balancing the entire dining experience.

Frequently asked questions

Recipe card

Easy Slow Cooker Pepper Steak with Rich Savory Sauce

Prep 15 minCook 6 hRest 3 minTotal 6 h 18 minServes 4

Ingredients

• 1 1/2 lb flank steak, sliced across the grain into thin strips
• 1 red bell pepper, cored and sliced into thick strips
• 1 green bell pepper, cored and sliced into thick strips
• 1 yellow onion, sliced into thick wedges
• 1 1/2 cups savory brown sauce

Instructions

1. Place the sliced flank steak, red bell pepper strips, green bell pepper strips, and yellow onion wedges directly into the insert of the slow cooker, spreading them out into an even layer.
2. In a small bowl, whisk the savory brown sauce thoroughly until it is completely smooth and uniform.
3. Pour the whisked savory brown sauce evenly over the steak and vegetables inside the slow cooker. Stir gently with tongs to ensure all ingredients are well coated.
4. Cover the slow cooker with the lid. Cook on low for 5 to 6 hours (or on high for 3 to 4 hours) until the beef is incredibly tender. Ensure the beef reaches a safe internal temperature of 145°F (63°C) when measured with a food thermometer, and allow the meat to rest for at least 3 minutes inside the cooker before serving.

Contains: soy, gluten

Estimated nutrition per serving

Calories

310

Protein

34 g

Carbohydrates

14 g

Fat

13 g

Fiber

2 g

Sugar

6 g

Sodium

980 mg

Automatic estimate from the ingredient list, not laboratory-verified.