Some nights call for steak, and some nights call for a dinner that does not involve a grill, a marinade, or a pile of washing up. This skillet is both. Thin strips of sirloin get a hard, fast sear in a screaming-hot pan — the kind of brown crust that tastes like a steakhouse — then sweet bell peppers and onions go into the same pan and pick up every browned bit the steak left behind. A knob of garlic butter at the end ties the whole thing together into a sauce you will want to spoon over rice, tuck into tortillas, or mop up with bread.
The whole trick is heat and timing. Steak strips cook in about two minutes, so the pan has to be genuinely hot before they go in, and they have to go in dry and in a single layer, or they steam instead of sear. The peppers need only a few minutes after that — long enough to soften and sweeten, short enough to keep a little bite. Pull the steak out while the peppers cook, then bring it all back together at the end, and nothing overcooks.
It is a 25-minute dinner that feels like a Friday-night treat, and it is endlessly flexible: rice bowls one night, cheesy steak sandwiches the next, and straight from the pan with a fork on the nights when nobody can be bothered with plates.
Why You’ll Love This Recipe
- Steakhouse flavor in 25 minutes: A hard sear and garlic butter give you the flavor of a much fancier dinner, on a weeknight timeline.
- One pan, almost no washing up: Steak, peppers, onions, and sauce all happen in the same skillet, back to back.
- Tender steak, guaranteed: Thin strips, a ripping-hot pan, and a short cook time mean juicy meat instead of chewy leather.
- Naturally low-carb, easily stretched: Serve it as-is for a lighter dinner, or pile it over rice, pasta, or into tortillas to feed a crowd.
- The peppers do real work: Sweet, slightly charred peppers and onions are not a garnish here — they are half the dish, and they soak up the garlic butter beautifully.
- Leftover magic: Cold the next day, the strips are perfect sliced over salads or tucked into sandwiches.
Tools You’ll Need
- Large skillet (12-inch), cast iron or stainless steel: You need a pan that holds serious heat — nonstick will not sear the steak properly.
- Sharp knife and cutting board: For slicing the steak thinly against the grain and cutting the peppers into even strips.
- Tongs: For flipping the steak strips fast and tossing the peppers without breaking them up.
- Paper towels: For patting the steak dry — the single most important step for a good sear.
- Small bowl: For mixing the steak seasoning before it goes on the meat.
Ingredients
For the Steak
- 1 1/2 lbs sirloin steak, sliced thinly against the grain into 1/4-inch strips
- 1 teaspoon kosher salt
- 1/2 teaspoon black pepper
- 1/2 teaspoon garlic powder
- 1/2 teaspoon smoked paprika
- 1 tablespoon vegetable oil (or another high-heat oil)
For the Peppers and Sauce
- 1 red bell pepper, sliced into strips
- 1 yellow or orange bell pepper, sliced into strips
- 1 green bell pepper, sliced into strips
- 1 medium yellow onion, halved and sliced
- 3 tablespoons unsalted butter, divided
- 5 cloves garlic, thinly sliced
- 1 tablespoon soy sauce
- 1 tablespoon Worcestershire sauce
- 1 teaspoon Dijon mustard
- 2 tablespoons chopped fresh parsley
To Serve
- Cooked rice, mashed potatoes, crusty bread, or warm tortillas
- Extra flaky sea salt, for finishing
Instructions
- Dry and season the steak. Pat the steak strips very dry with paper towels — this is what lets them sear instead of steam. Toss with the salt, pepper, garlic powder, and smoked paprika.
- Sear the steak in batches. Heat the oil in a large skillet over high heat until it just starts to smoke. Add half the steak in a single layer and sear for 60 to 90 seconds per side, until deeply browned. Transfer to a plate. Repeat with the remaining steak — do not crowd the pan.
- Soften the peppers and onions. Reduce the heat to medium-high. Melt 1 tablespoon of butter in the same skillet, scraping up the browned bits. Add the peppers and onion with a pinch of salt and cook for 4 to 5 minutes, stirring occasionally, until softened but still with a little bite and lightly charred at the edges.
- Build the garlic butter sauce. Push the peppers to the edges of the pan. Melt the remaining 2 tablespoons of butter in the center, add the sliced garlic, and cook for 30 seconds until fragrant. Stir in the soy sauce, Worcestershire sauce, and Dijon mustard, scraping the bottom of the pan as the sauce bubbles.
- Bring it together. Return the steak and any juices from the plate to the skillet. Toss everything together for 1 minute, just until the steak is heated through and coated in the sauce — do not cook it longer or it will toughen.
- Finish and serve. Off the heat, shower with parsley and a pinch of flaky sea salt. Serve immediately over rice, with mashed potatoes, or piled into warm tortillas.
Serving Ideas
- Over garlic butter rice: The rice soaks up the sauce, and the whole plate comes together in the time the steak rests.
- As cheesy steak sandwiches: Pile the steak and peppers into toasted hoagie rolls with melted provolone for a Philly-inspired dinner.
- In warm tortillas: Add a spoonful of sour cream and some pickled jalapeños for quick steak fajitas.
- With mashed potatoes: The garlic butter sauce over creamy mash is pure comfort, and it turns a quick skillet into a proper Sunday-style plate.
Tips for the Best Results
- Slice against the grain, and slice thin. Look for the lines running through the steak and cut across them, about 1/4 inch thick — this is what keeps the strips tender.
- Partially freeze the steak for 20 minutes before slicing. Firm meat slices far more thinly and evenly than soft, room-temperature steak.
- The pan must be hot — really hot. If the oil is not shimmering and nearly smoking, the steak will grey instead of brown. Wait for it.
- Work in batches, always. Crowded steak steams. Two quick batches take four minutes total and give you a crust worth the effort.
- Slice the garlic, do not mince it. Thin slices perfume the butter without burning as fast as minced garlic, and they look beautiful in the finished pan.
Mistakes to Avoid
- Overcooking the steak twice. The steak is already cooked when it comes out of the pan. The final toss is just to heat it through — one minute, no more.
- Using a cold or nonstick pan. A pan that cannot hold high heat gives you grey, steamed meat. Cast iron or stainless steel is the right tool here.
- Cutting with the grain. Strips cut with the grain stay chewy no matter how well you cook them. Against the grain is non-negotiable.
- Adding the garlic too early. Garlic burns fast in a hot pan. It goes in at the sauce stage, over medium heat, for 30 seconds only.
- Skipping the rest between batches. If the pan cools after the first batch, let it come back up to temperature before the second batch goes in.
Storage
- Refrigerator: Store leftovers in an airtight container for up to 3 days.
- Reheating: Warm gently in a skillet over medium heat with a splash of water or broth, just until heated through — about 2 minutes. The microwave toughens the steak.
- Freezing: Freeze the cooked steak and peppers in a freezer bag for up to 2 months. Thaw overnight in the fridge before reheating gently in a skillet.
FAQs
What cut of steak works best?
Sirloin is the sweet spot for price and tenderness. Flank steak and skirt steak also work beautifully — just slice them extra thin against the grain.
Can I use frozen peppers?
You can, but they release more water and will not char the same way. If you do, cook them a minute or two longer to drive off the moisture before adding the garlic butter.
How do I keep the steak from getting tough?
Three things: slice thin against the grain, sear fast in a very hot pan, and do not cook it again after the final toss. Follow those and it stays tender.
Can I make this spicier?
Absolutely — add a sliced jalapeño with the peppers, or a pinch of red pepper flakes to the garlic butter. A dash of hot sauce at the table works too.
What if I do not eat soy sauce?
Swap it for an extra tablespoon of Worcestershire sauce and a pinch of salt. The sauce will be slightly less savory but still rich from the butter and garlic.
Recipe Summary
- Prep time: 10 minutes
- Cook time: 15 minutes
- Total time: 25 minutes
- Servings: 4
- Course: Dinner
- Cuisine: American
