Slow-Cooked Sirloin

"A tasty and tender meal you can fix in the crockpot and forget about. Great to serve with garlic mashed potatoes and a green salad. Found the original recipe in Taste of Homes and changed it to our tastes. Cooking time is for the lower temp on the crock-pot."
photo by katew photo by katew
photo by katew
photo by Lavender Lynn photo by Lavender Lynn
photo by Lavender Lynn photo by Lavender Lynn
Ready In:
6hrs 15mins




  • Season beef on both sides with steak seasoning. In a large nonstick skillet coated with cooking spray, brown beef on both sides.
  • Place onion and green pepper in a 3 quart slow cooker. Top with beef. Combine the broth, Worcestershire sauce, thyme, garlic, pepper, salt and pepper flakes; pour over beef.
  • Cover and cook on high for 3-4 hours or on low 6-7 hours or until meat reaches desired doneness.
  • Remove beef and keep warm. Combine cornstarch and water until smooth; gradually stir into cooking juices. Add beef back to crock and cover and cook about 30 minutes longer or until slightly thickened.

Questions & Replies

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  1. Shaleah L.
    So I seen this recipe is with beef.. Would it matter much if I use pork sirloin?


  1. katew
    I have not cooked a lot of red meat in my slow cooker so this was a great learning curve for me. I thought it came together well after cooking on low for 7 hours. I enjoyed eating the vegies but also quite liked the meat even though I do not often eat red meat. It was not falling apart and this was what I was aiming for but this might be to do with error on my part.
  2. P E.9912
    Being new to cooking different cuts of beef, I was afraid it might not turn out well. But, we just had it for dinner and I signed up on this website just to say how good it is! I used fresh thyme and cut up a tomato from the garden. I added Montreal steak seasoning since it has the salt, pepper and crushed red pepper flakes and it was excellent! I'm so pleased. Thank you.
  3. mums the word
    Normally, I am not a fan of steak done in the crockpot, but this was great. I did use top sirloin steak as indicated in the recipe but since it was on sale for $2.99/lb I didn't bat an eye. Unlike the other reviewers, I am not so sure how well a cheaper cut would fare. I would think it may be likely to dry out. Anyways, I have a funny little story to go along with this review. I chose this recipe because it was a crazy night (hockey, hair appointments etc). I left my DH instructions to complete the dish by adding the cornstarch and water, which I had ready on the counter. He decided that the gravy wasn't thickening enough after 30 minutes, so he would just add more cornstarch. Unfortunately, I don't have my containers labelled as the likelihood of anyone going in my kitchen to cook (other than me) is equal to that of hell freezing over. He grabbed icing sugar and threw in another 2 tbsp of that instead. No worries, it still tasted great, did nothing to improve the thickness of the gravy though (wink!). First thing this morning, I labelled the cornstarch and the icing sugar. Lesson learned! The only change I did make was I added 1 tbsp soy sauce and omitted the salt. Thanks for sharing this great recipe Mama, I will def make again.
  4. mark9164
    Absolutely amazing. Added 2-1/2 tps flour instead of cornstarch
  5. Jasmin S.
    It is so tender and delicous! I use a london broil and my family loves it! Even my 3 year old!


<p><img src= alt=width=300 height=150 />I live in Boise, Idaho (home of the famous Idaho potatoes and Boise State University whose football team plays on the blue smurf turf). My husband and I are retired and travel quite a lot.&nbsp;&nbsp; We have a place in Boise, Idaho and now a part-time home in Carlsbad, California.&nbsp; It's nice to be in California where they have so much more fresh food...vegetables and fish!&nbsp;&nbsp;They have so many farmer markets that I really have to watch myself, but cooking is so much fun and they have such a variety of things to use.</p> <p>I have two daughters and one has three angels (the twins who are now 4) and my man who is 2 and just as big as the twins.&nbsp;&nbsp;&nbsp;I do miss them when we are gone...they grow so fast.<br /><br />I love to collect and read cookbooks -- way to much from my husbands point of view. I love to watch Rachael Ray, Paula Deen, Barefoot Contessa and Everyday Italian. I have used this site for several months and have loved the recipes and info that comes with them...had to join! <a href= target=_blank><img src= border=0 alt=Photobucket /> <br /><br /><br /><br />The only peeve that I really have is going on this site and reading reviews on recipes where the person has totally changed the recipe and didn't like the results so therefore giving low ratings.&nbsp;<br /><br /><img src= alt=/ /><img src= alt=/ /> <br /><br /><img src= alt=/ /><img src= alt=/ /> <object width=400 height=300 data= type=application/x-shockwave-flash> <param name=data value= /> <param name=src value= /> <param name=wmode value=transparent /> </object> img</a><a href= target=_blank><img src= border=0 alt=Photobucket /></a><a href= target=_blank><img src= border=0 alt=Photobucket /></a><img src= alt=/ /><img src= alt=/ /><a href= target=_blank><img src= border=0 alt=Photobucket /><img src= alt=/ /><img src= alt=/ /><img src= border=0 alt=Photobucket /><img src= alt=/ /><img src= alt=/ /><img src= alt=/ /> <br /><img src= alt=/ /><img src= alt=/ /><img src= alt=/ /><img src= border=0 alt=/ /><img border=0 alt=Photobucket /><img src= border=0 alt=New /></a></p>
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