Crockpot Sirloin Tips with Mushroom Stroganoff Gravy Step-by-step instructions

Before you start

Before you start, cut the sirloin tips into uniform 1-inch pieces if they aren't already. Dice the onion and slice the mushrooms. Measure out the sour cream and have the gravy mix packet ready.

No need to brown the beef first—the slow cooker does all the work. Set out a 6-quart slow cooker and make sure it's clean. If you plan to serve with noodles, bring a large pot of salted water to a boil just before serving.

Instructions

Layer and Set

1. 1Layer the Ingredients
   Place the sirloin steak tips in the bottom of a 6-quart slow cooker. Scatter the diced onion over the beef, then add the sliced mushrooms. Pour the condensed cream of mushroom soup over the top, spreading it evenly with a spoon.
   Look for The beef is nestled under a layer of soup and vegetables.
   Tip No need to stir—layering keeps the beef moist as it cooks.
2. 2Add the Creamy Elements
   Dollop the sour cream over the soup layer, then sprinkle the brown gravy mix evenly over the top. Do not stir; the ingredients will meld as they cook.
   Look for The top looks creamy with speckles of gravy mix.
   Tip Let the gravy mix sit on top—it will dissolve into the sauce during cooking.

At the end of this phase, the slow cooker contains a neat stack of ingredients: beef on the bottom, then onions and mushrooms, then soup, sour cream, and gravy mix on top.

The colors are distinct—white, brown, and creamy—and the aroma is already promising. The beef is raw and the vegetables are crisp, but the foundation is set for a rich, slow-cooked meal.

Slow Simmer

3. 3Slow-Cook the Beef
   Cover the slow cooker and cook on low for 6 to 8 hours, or on high for 3 to 4 hours, until the beef is fork-tender. The internal temperature of the beef should reach at least 145°F (63°C) for medium-rare, or cook longer for well-done. Let the beef rest for 3 minutes before serving.
   Look for The gravy is bubbling gently around the edges, and the kitchen smells richly savory.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Low and slow gives the toughest cuts time to become meltingly tender.
4. 4Finish the Sauce
   Once the beef is tender, stir the sauce well to combine the sour cream and gravy mix into a smooth, velvety gravy. Taste and adjust seasoning with salt and pepper if desired.
   Look for The sauce is thick, glossy, and a deep mahogany color.
   Tip If the sauce seems thin, remove the lid and cook on high for 15 minutes to reduce.

After several hours on low, the kitchen fills with a deep, savory aroma. The gravy is bubbling gently at the edges, and the beef is visibly tender, pulling apart with a fork. The sauce has darkened to a rich mahogany and smells of mushrooms and onions. Everything is cooked through, and the flavors have melded into a cohesive, comforting dish.

Finish and Serve

5. 5Cook the Noodles
   About 20 minutes before serving, bring a large pot of salted water to a boil. Cook the egg noodles according to package directions until al dente. Drain and toss with the butter.
   Look for The noodles are tender and lightly coated with butter.
   Tip Tossing with butter keeps the noodles from sticking together.
6. 6Serve and Garnish
   Spoon the buttered noodles onto plates or a platter. Ladle the sirloin tips and gravy generously over the noodles. Sprinkle with fresh parsley if using.
   Look for Steam rises from the beef and gravy as it hits the noodles.
   Tip Serve with a side of crusty bread to soak up every bit of gravy.

The noodles are buttery and tender, ready to catch the luscious gravy. The beef is fork-tender, and the sauce is thick, glossy, and velvety. When ladled over the noodles, steam rises, and the dish looks like a hearty, homey dinner. A sprinkle of parsley adds a fresh, green note. The meal is complete and ready to enjoy.

Common mistakes

One common mistake is lifting the lid to stir or peek—this releases heat and extends cooking time. Trust the slow cooker and leave it covered. Another is using low-fat sour cream, which can curdle more easily; full-fat gives a smoother sauce.

Finally, don't skip the rest time for the beef. Letting the meat rest for a few minutes before serving allows the juices to redistribute, keeping the tips moist.

How to tell it’s done

The beef is done when it is fork-tender and easily pulls apart. For food safety, the internal temperature should reach at least 145°F (63°C) for medium-rare, but for this dish you'll likely cook it longer, to 160°F (71°C) or beyond, for fall-apart tenderness.

The gravy should be thick and glossy, coating the back of a spoon. If it seems thin, remove the lid and cook on high for 15 to 20 minutes to reduce.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest