Slow Cooker Balsamic Beef Sirloin Tips

From the roundup: 22 High Protein Slow Cooker Meals That Actually Fill You Up

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On a game day when kids need to be at practice by four and dinner still has to happen, I get slow cooker balsamic beef sirloin tips going right after morning drop-off so it has the full eight hours it needs on low. Sirloin tip is leaner than chuck, which means it slices cleanly and does not feel heavy after a long afternoon on the bleachers, but it absolutely needs that full cook time, so do not try to shortcut it on high. The move I learned after one too many thin sauces is the cornstarch slurry in the last thirty minutes, which pulls all that balsamic braising liquid into something glossy enough to spoon over mashed potatoes or egg noodles without a second thought. Leftovers reheat in a saucepan with a splash of broth and taste even better the next day.

Why you will love this

• Sirloin tip is leaner than chuck roast but still turns genuinely tender after a full 7 to 8 hours on low, no compromise on texture.
• The balsamic and Worcestershire build a savory, slightly tangy sauce without any cream or butter, so it doesn’t feel heavy.
• One teaspoon of cornstarch stirred in at the end thickens the sauce on the spot, no stovetop reduction needed.
• It serves six, and the leftovers keep well for four days, which means lunch is handled for the next few days.
• Works over mashed potatoes, cauliflower mash, or egg noodles, so you can use whatever you already have.

Tips for success

• Dry the beef thoroughly before searing. Wet meat steams in the pan and you lose the brown crust that gives the sauce its depth. I use a full sheet of paper towels per batch.
• Sear in two batches and don’t rush it. Crowding the pan drops the temperature and you end up with gray, steamed beef instead of a proper crust. Two minutes per side, leave it alone.
• Keep the lid on the entire cook time. Every time you lift it you add 20 to 30 minutes. I’ve learned this the hard way at 6 p.m. when dinner is already late.
• Use regular balsamic vinegar, not a thick aged glaze or a reduction. The glaze is too sweet and too concentrated for a long braise. It turns the sauce cloying by hour four.

If the sauce looks thin or bland

• If the sauce is still thin after the cornstarch slurry, cook on HIGH with the lid slightly ajar for another 15 minutes. The extra evaporation helps.
• If the flavor tastes flat, add salt a pinch at a time before serving. Balsamic can mellow significantly over eight hours and sometimes just needs a little salt to come forward again.
• If the beef shreds completely instead of holding chunk shape, it cooked too long or your slow cooker runs hot. Pull it at seven hours next time and check for doneness early.
• If the sauce tastes too sharp, a small pinch of sugar stirred in at the end balances the balsamic without making it sweet.

Substitutions

Chuck roast cut into 1 1/2-inch chunks works in place of sirloin tip and is more forgiving if your slow cooker runs hot. It has more fat, so the sauce will be richer. Red wine vinegar can substitute for balsamic in a pinch, but use about two tablespoons less since it’s sharper and less sweet. For a gluten-free thickener, arrowroot powder works the same way as cornstarch at the same amount.

If someone at the table skips onions, you can leave them out without wrecking the dish. The garlic and herbs carry the flavor. For lower sodium, the recipe already calls for low-sodium broth, but you can also reduce the Worcestershire by half and taste at the end before adding any extra salt.

Make-ahead and storage

You can cut and season the beef the night before, store it covered in the fridge, and load the slow cooker in the morning. The onion and sauce mixture can also be made the night before and refrigerated separately. Store leftovers with the sauce in a sealed container in the fridge for up to four days. Reheat gently on the stovetop over low heat with the sauce spooned over the beef so it doesn’t dry out. The microwave works but tends to toughen the edges of the chunks.

This freezes well. Portion the beef and sauce together in freezer-safe containers for up to three months. Thaw overnight in the fridge and reheat slowly on the stovetop, adding a splash of beef broth if the sauce has thickened too much during freezing.

Brittany Stage

Slow Cooker Balsamic Beef Sirloin Tips

Sirloin tip roast cut into hearty chunks braises all day in a balsamic, garlic, and beef broth sauce that reduces into something rich and glossy, then gets served over mashed cauliflower or egg noodles for a lean, protein-packed dinner.

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Prep Time 20 minutes mins

Cook Time 8 hours hrs

Total Time 8 hours hrs 20 minutes mins

Servings: 6 servings

Course: Dinner

Cuisine: American

Calories: 390

Ingredients Equipment Method Notes

Ingredients

  

• 2 1/2 lbs sirloin tip roast cut into 1 1/2-inch chunks
• 1 tsp kosher salt plus more to taste
• 1/2 tsp black pepper
• 1/2 tsp garlic powder
• 2 tbsp olive oil for searing
• 1 medium yellow onion diced
• 4 cloves garlic minced
• 3/4 cup low-sodium beef broth do not reduce this amount
• 1/3 cup balsamic vinegar regular, not aged or thick glaze
• 2 tbsp Worcestershire sauce
• 1 tbsp tomato paste
• 1 tsp dried thyme or 3 sprigs fresh thyme
• 1 tsp dried rosemary roughly crumbled between your fingers
• 1 tsp cornstarch for thickening at the end
• 1 tbsp cold water for cornstarch slurry

Equipment

• 6-quart slow cooker
• large skillet
• small bowl
• tongs

Method

 

1. Pat the sirloin tip chunks dry with paper towels, then season all over with salt, pepper, and garlic powder. Drying the surface is important here because you will sear the beef and wet meat will steam instead of brown. Heat the olive oil in a large skillet over medium-high heat until it shimmers.
2. Working in two batches so you do not crowd the pan, sear the beef chunks for about 2 minutes per side until a deep brown crust forms. You are not cooking the meat through here, just building color and flavor on the surface. Transfer the seared pieces to your slow cooker as you go.
3. In the same skillet, turn the heat down to medium and add the diced onion. Cook for 3 to 4 minutes until softened. Add the minced garlic and stir for 30 seconds. Add the tomato paste and stir it into the onion for another minute so it loses its raw edge. Pour in the balsamic vinegar and Worcestershire sauce and scrape up any browned bits stuck to the bottom of the pan. Those bits are flavor you do not want to leave behind.
4. Pour the onion and sauce mixture over the beef in the slow cooker. Add the beef broth, thyme, and rosemary. The broth should come up about halfway on the beef chunks but not cover them completely. Give everything a gentle stir to distribute the seasoning. Put the lid on securely.
5. Cook on LOW for 7 to 8 hours. Do not lift the lid during cooking as that releases heat and extends the time. The beef is done when it is very tender and pulls apart easily when pressed with a fork but still holds its chunk shape. It should not be completely falling apart like a pulled beef, more like a tender steak bite.
6. In a small bowl, whisk the cornstarch together with the cold water until smooth. Pour the slurry into the slow cooker and stir gently to combine it with the braising liquid. Replace the lid and cook on HIGH for 20 to 30 more minutes until the sauce thickens to a glossy, spoonable consistency.
7. Taste the sauce and adjust salt if needed. Serve the beef over mashed cauliflower, buttered egg noodles, or creamy mashed potatoes. Spoon the sauce generously over every plate. Finish with fresh thyme leaves or chopped flat-leaf parsley if you want a little color on the plate.

Notes

Sirloin tip is leaner than chuck, which makes it a great high-protein choice but also means it can dry out faster if undercooked at too high a temperature or if the broth level is too low. Keep the lid on the full cook time and use the full three-quarter cup of broth as written. If you want more sauce, add an extra quarter cup of broth at the start.

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