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Kalyn's Kitchen

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary features inexpensive and low-carb pork sirloin tip roast that gets tender and delicious in the slow cooker. Use Slow Cooker Recipes to find more dinners like this one.

Click to PIN Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary!

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar, Rosemary, and Red Onions found on KalynsKitchen.com

Food blogging can be pretty frustrating at times, but especially when you’ve made a recipe that tasted great, but the photos didn’t really make the food look good. I made this Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary for the second time and the final photos still weren’t anything I was happy with.

Then I noticed the photo of the pork roast in the slow cooker and I decided that although it’s a pretty casual photo it did show how tasty the pork roast looked when it was done. And since I still have a broken arm (two more weeks, fingers crossed) I decided to share this delicious slow cooker pork roast with the photo I had.  No worries, right?

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar, Rosemary, and Red Onions found on KalynsKitchen.com

How to Make Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary:

(This is just a summary of the steps shown in the photo; scroll down for actual recipe.)

  1. This was another recipe where I used one of those very inexpensive and lean pork sirloin tip roasts that come in a four-pack at Costco.
  2. We started by grinding up a mixture of black pepper, Penzey’s Pork Chop Seasoning, and Rosemary and Garlic Herb Rub and rubbed it all over the pork roast.  If you don’t have those exact spice and herb blends, any seasonings with similar ingredients can work.
  3. Then we heated some olive oil in a large frying pan and browned the roast well on all sides.
  4. Put the roast in the slow cooker, then deglaze the pan with the beef stock, simmer to reduce by half, then strain to remove any big pieces of spices or congealed juice from the meat.
  5. Then add the balsamic vinegar, reduce heat to medium, and cook about 5 minutes. Pour the liquid over the roast in the slow cooker and cook for about 2 hours on high.

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar, Rosemary, and Red Onions found on KalynsKitchen.com

  1. At this point you can remove the roast and put the onions in the bottom if you want them really well done. We just turned the roast over, piled the onions in on top of the meat, and cooked it for about 90 minutes more on high. By then it was looking pretty delicious!
  2. We turned off the slow cooker but kept the meat in there to stay warm while we simmered the liquid for about 20 minutes so it was a little more concentrated.
  3. Then slice the meat, arrange the onions around it, and pour the sauce over.  Serve hot.

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar, Rosemary, and Red Onions found on KalynsKitchen.com

More Tasty Ideas with Pork for Dinner:

Slow Cooker and Pressure Cooker Pork Index ~ Slow Cooker or Pressure Cooker
Slow Cooker Bavarian Pork Sirloin Tip Roast with Sour Cream Gravy ~ Kalyn’s Kitchen
Apple-Cranberry Stuffed Pork Roast ~ Simply Recipes
Instant Pot Pulled Pork with Low-Sugar Barbecue Sauce ~ Kalyn’s Kitchen

Weekend Food Prep:

This recipe has been added to a new category called Weekend Food Prep  to help you find recipes you can prep or cook on the weekend and eat during the week!

Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary

This Slow Cooker Pork Sirloin Tip Roast features inexpensive pork sirloin tip roast that gets tender and delicious when it’s cooked with balsamic vinegar and rosemary.


  • pork sirloin tip roast, 2-3 lbs. before trimming
  • 2 tsp. Rosemary and Garlic Herb Rub (or any blend with similar flavors will work, see notes)
  • 1 tsp. Penzey’s Pork Chop Seasoning (or any blend with similar flavors will work, see notes)
  • 1/2 tsp. fresh ground black pepper
  • 1 T olive oil
  • 1 cup beef stock
  • 1/4 cup balsamic vinegar
  • 3 small red onions, cut into thick slices and separated into rings


  1. Trim visible fat from the pork sirloin tip roast.  (There will not be much fat.)  Use a spice grinder or mortar and pestle to grind together the spices; then rub the meat all over with the spice mix, using it all.
  2. Heat the oil in a large frying pan over medium-high heat and brown the pork roast well on all sides.  (This will take 8-10 minutes; don’t rush the browning step.)  Put the browned roast in the slow cooker.
  3. Add the beef stock to the frying pan, turn the heat to high, and simmer until the stock is reduced by half, scraping any browned bits from the bottom.
  4. When it’s reduced to 1/2 cup, strain the mixture, put it back in the frying pan, add the balsamic vinegar, reduce heat to medium, and cook about 5 minutes more.  Pour the liquid over the meat and cook on high for about 2 hours (or on low for 4-5 hours.)
  5. When the meat has cooked on high for about 2 hours (or on low for 4-5 hours), peel the red onions, cut into thick slices, and separate them into rings.
  6. You can either remove the roast and put the onions in the bottom (for more well-done and more vinegar-flavored onions or turn the meat over and pile the onions around it (for less well done and less vinegar-flavored onions.)
  7. Turn slow cooker to high if you had been cooking on low and cook with the onions added for about 60-90 minutes more.
  8. Taste the sauce and see if you’d like it a little more concentrated, and if so, remove the meat, pour the sauce into a pan, and simmer for about 20 minutes on medium-high heat (or until it is as concentrated as you’d like it.)  I turned off the slow cooker but put the roast back inside it to stay warm while I reduced the liquid.
  9. Slice roast across the grain into slices about 3/4 inch thick, arrange on a plate with the onions, and serve with the sauce poured over or in a bowl on the side.


Equipment: I used a Crock-Pot 2.5-Quart Slow Cooker for this recipe, but a slightly larger size will work.

I used Rosemary and Garlic Herb Rub for this recipe, but similar herb blends will work. I used Penzey’s Pork Chop Seasoning (affiliate link) for this recipe.

Recipe created by Kalyn.

All images and text ©

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar, Rosemary, and Red Onions uses extra lean pork roasts which are perfect for the South Beach Diet, which recommends meat with less than 10% fat. This recipe is also Paleo and it’s suitable for any type of Low-Carb diet, although you may want to use fewer onions if you’re trying to limit carbs.

Find More Recipes Like This One:
Use the Recipes by Diet Type photo index pages to find more recipes suitable for a specific eating plan. You might also like to Follow Kalyn’s Kitchen on Pinterest to see all the good recipes I’m sharing there. Click here to see Slow Cooker / Pressure Cooker Recipes on my other site!

Nutritional Information?
If you want nutritional information for a recipe, I recommend entering the recipe into this nutrition analyzer, which will calculate it for you. Or if you’re a member of Yummly, you can use the Yum button on my site to save the recipe and see the nutritional information there.

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45 comments on “Slow Cooker Pork Sirloin Tip Roast with Balsamic Vinegar and Rosemary”

  1. Jumping back on this old post with a question! I love this recipe but my Costco no longer sells this particular roast (how I miss that 4-pack!). Have you ever tried it with another type of pork roast? Maybe a shoulder??

    • I haven’t tried it with any other kind of pork roast. I wish I knew about pork roast to make a recommendation, I would ask the butcher what other type of roast they think would work to replace pork sirloin tip roast in a recipe and see what they say. Glad you’ve enjoyed the recipe.

  2. Never mind just re-read the recipe. THanks!

  3. Do you warm the balsamic at high heat for 5 minutes or a lower heat?

  4. Thanks Pam! I loved it. Really liking those pork sirloin roasts from Costco.

  5. Oh this looks so good!

  6. Thanks Doren, what a nice comment. I discovered the pork sirloin at Costco, tried it because of the price, and now I'm sold on it.

  7. This looks great… don't know how I missed it last year. Have to check my Costco to see if they have that cut; I'm not familiar with it. But I'm certain I'll love it. It's typical Kalyn… great ingredients, has to be delicious!!

  8. Kelley, phase one is only two weeks, after that rice would be great!

  9. Gorgeous, Kalyn! I'd serve it over rice (I know, a no-no for SB) but those juices look too good not to! Some braised greens to go with and I think I've got a dinner covered this coming week!

  10. Hi Sally; Happy New Year to you too!

    You must get a slow cooker, and then try this recipe. I really like the pork sirloin.

  11. Happy New Year, Kalyn!

    I never cooked pork sirloin before, can you imagine THAT?

    I am not sure I've paid attention to this cut, I will have to look for it at our grocery store. Of course, I still need to get a crockpot, but that is on my list of things to get in the future….

  12. Lisa, so glad you like it, enjoy!

  13. I love using my slow cooker! Love this flavor combination! Thanks, Kalyn!

  14. Excellent recipe! I modified it slightly and cooked in a pressure cooker rather than a slow cooker. I also made a red and yellow pepper risotto that was a great addition to this dish. Thank you for sharing.

  15. Michelle, yaay! Hope things are going okay for you.

  16. I just sat down to find ways to use the pork sirloin roast that came with my meat CSA and was thrilled to see one from my friend – YOU! It sounds delicious and I just printed a copy so that I can prepare it for dinner on Sunday with the family. xoxox M

  17. I know 3 posts on 1 recipe…I made it and it was wonderful… total success. I was going to be out, and didn't want to overcook it so I put it 4 hours on low and then it auto switched to warm for 3-4 hours on warm. I added the onions when I got home, but after a half hour I couldn't wait so transferred the juice and onions to a saucepan and reduced. Added a little ginger to the rub as I didn't have the pork chop spice mix and when I looked on the Penzey website I noticed it mentioned ginger. I was able to make the other mix. Highly recommend,sliced up really nicely too, didn't shred. Thanks again!

  18. Went to Costco today and bought the roasts. I have never cooked a pork roast, so I am glad you told us what to buy. Can't wait to make it, and am happy it is a small roast. Put the other 3 in the freezer for now and can't wait to experiment with some of the other recipes later on. Thanks!

  19. Jeanne I fell on the ice and broke my arm. Ugh. But I'm getting my cast off in 8 more days, yaay!

  20. Don't you just hate that – something that tastes like heaven but looks like something the dog dragged in?? And roasts are particularly bad for that – bug brown lumps of meat! But I love this photo – makes me want to grab a fork 🙂 Sorry to hear about the arm – what did you do??

  21. This looks amazing… I am a good cook, but my weak point is pork. I love all things Costco, so I will go find it and try it. Rosemary, Balsamic vinegar, onions…love, love, love …. can't wait to make it.

  22. Glad you liked it and also good to hear it will work with a larger slow cooker.

  23. We started the pork in our slow cooker (a pretty big one), and went out to shop for a new stove. When we got back, the roast smelled so good! I added the onions while we got settled/fed the dogs. Because the cooker was big, the onions didn't submerge, and I just cooked them in liquid while it simmered down. I was lovely, tasty, and the onions just make the sauce. Tomorrow I'll make a sandwich with the pork and the drained onions – yum.

    I think you could do this with just garlic salt and some rosemary, but the rubs added flavor, and the sauce kept the meat from drying into wood. Thank you for a great and timely recipe!

  24. I LOVE a good slow-cooked piece of pork and this recipe sounds fabulous. Droolworthy photos, too 🙂

  25. How could I not respond to a nice comment like that? (Can type a little, but long things take quite a while!)

  26. Please don't worry about responding – just put the energy into healing. Wanted to let you know how darn auspicious this post is. My oven died, completely and finally, just before the blizzard. And last night I took out a Costco pork lump to roast…. well duh! So, I thought I'd have to try the slow cooker – and here in my inbox is this lovely recipe. Can't wait to get the smells going! Thank you for cooking, for being uncanny – everything.

  27. Sandi, thanks! Hope you enjoy.

  28. That looks really really good… especially for a chilly sunday afternoon.
    Sunday Roast it is!

  29. Winanne, glad it worked. And I'm counting the days; cast off in about 9 more days!

  30. What a bummer! Thanks for notifying Feedblitz that I wasn't getting your mail;you're back in my inbox every day now. Sending healing energy for a speedy recovery, Winanne


  31. Oh Pam, so glad to hear that. That's really all I'm hoping for with the photos (I'll never be a food stylist!)

    Thanks Marlene. So glad you're enjoying the blog.

  32. This sounds like a perfect recipe for the cold weather we are all being hit with. I am a new fan of yours, I dislike wasting too. Keep up the good work.

  33. This photo made me hungry. I can't wait to try this.

  34. Thanks Paula! I guess those hard-to-photograph foods are helping us become better photographers, lol!

  35. Hi Kalyn,
    I love those little sirloin roasts–always looking for new ways to prepare them. Thanks for another idea.

    Also, I know what you mean about photos that don't do the food justice. Frustrating, isn't it.

    Get well soon.

  36. I've been really happy with the pork sirloin tip roasts. They are super lean though; best to use a cooking method that adds some liquid.

  37. This looks so good. Next time I go to Costco I will have to look for the 4 pack of pork sirloin. Looks moist and tender.

  38. You are so sweet! It's frustrating isn't it, because you know if the photo looks bad no one will try the recipe.

  39. So many things that I make don't end up on my blog because of blah photos! BUT, your photos of this roast are mouthwatering, especially that very first one. I love your slow cooker meals!!

  40. Alex, I agree completely!

  41. Loved the recipe. I just think pork sirloin and rosemary are such great friends, aren't they?

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