Slow Cooker Pepper Steak with Flank Steak (Easy Hearty Supper)
This Slow Cooker Pepper Steak with Flank Steak is a comforting, old-fashioned dinner made with tender beef strips, sweet bell peppers, and a savory soy-based gravy that slow cooks to perfection. With just a handful of simple ingredients, this set-it-and-forget-it recipe delivers big flavor and a hearty meal guests and family never get tired of.
Why You’ll Love This Recipe
Easy slow cooker beef dinner with minimal prep
Fork-tender flank steak that stays juicy
Rich, savory sauce made from pantry staples
Perfect for busy weeknights or casual entertaining
Budget-friendly and great for feeding a crowd
Versatile serving options: rice, potatoes, noodles, or sandwiches
Ingredients for Slow Cooker Pepper Steak
1½ pounds thin-sliced flank steak, cut into strips
2 large green bell peppers, seeded and thinly sliced
1 (10.5-ounce) can condensed beef broth or French onion soup
¼ cup soy sauce
These simple ingredients combine to create a classic pepper steak slow cooker recipe with deep, savory flavor and tender beef.
How to Make Slow Cooker Pepper Steak Tender and Flavorful
Slice the Beef for Maximum Tenderness
Lay the flank steak on a cutting board and slice it into bite-sized strips against the grain.
Benefit: Cutting against the grain breaks down muscle fibers, resulting in tender, easy-to-chew beef after slow cooking.
Layer the Ingredients
Spread the sliced beef evenly in the bottom of a 4- to 6-quart slow cooker. Top with the sliced green bell peppers.
Benefit: Layering ensures even cooking and allows the peppers to soften without becoming mushy.
Add the Savory Sauce
In a small bowl, whisk together the condensed beef broth (or French onion soup) and soy sauce. Pour evenly over the beef and peppers.
Benefit: This simple sauce creates a rich, umami-packed gravy without extra steps.
Slow Cooker Cooking Instructions
Cover and cook:
LOW for 6–7 hours, or
HIGH for 3–4 hours
Cook until the beef is very tender and the peppers are soft but still hold their shape. Gently stir, taste, and adjust seasoning with a splash more soy sauce if desired.
Serving Suggestions for Pepper Steak
Serve this hearty slow cooker pepper steak:
Over mashed potatoes
On steamed rice
With buttered egg noodles
Inside warm hoagie rolls with melted cheese for a sandwich
Spoon the flavorful cooking juices generously over the top for maximum comfort-food appeal.
Variations & Helpful Tips
Swap in red or yellow bell peppers for added color and sweetness
Add a sliced onion with the peppers for extra depth
For a thicker sauce, stir 1 tablespoon cornstarch + 2 tablespoons cold water into the slow cooker during the last 30 minutes
Add 1–2 tablespoons brown sugar for a classic café-style pepper steak flavor
Trim visible fat from the steak for a leaner meal
Thin the sauce with a splash of water or low-sodium broth if desired
