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Home » Dinner » Beef » Slow Cooker Mushroom and Onion Italian Beef

Slow Cooker Mushroom and Onion Italian Beef

Created: January 19, 2017 Updated: January 6, 2023 by lyuba 4 Comments

1.2K shares
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Delicious, tender, and flavorful beef made in a slow cooker. This beef is slow-cooked with Italian herbs, mushrooms, and onions. It’s perfect as a nice sub sandwich and as a main dish.

side view of Mushroom and Onion Italian Beef sub being dipped in au jus sauce

“Now that the weather is getting cooler, I will use my slow cooker all the time!”

That’s something I say every year and yet…it sits on the top of my fridge getting dusty. You know when you pull down an old book from the top shelf of the library, blow on it, and lots of dust flies off? That’s pretty much me every time I pull down my slow cooker.

I always say that I will use it more but in reality, I use it only for making some shredded beef or chicken recipes. When I think slow cooker, I automatically start craving some BBQ chicken or pork. I see so many mouthwatering recipes for soups, dips, and stews made in a slow cooker and it’s inspiring. But, every time I actually get down to making it, I still go for my stove over the slow cooker. I really like the fact that I can make soups and dips quicker on my stove. When it comes to tender, juicy meats that fall apart in your mouth, much like this Italian Beef, a slow cooker is a must though.

Slow Cooker Mushroom and Onion Italian Beef in a white bowl

This is one tasty, tasty beef recipe and makes such a nice Italian Beef Dip sandwich too. You can also use it as a main dish and serve it with some roasted potatoes and green beans. Besides these ideas, I’m sure you’ll find many ways to use this shredded Italian Beef.

Don’t forget to save the juices from cooking the beef. It will make a nice dipping liquid for a sandwich.

Mushroom and Onion Italian Beef sub with au jus sauce in a small white bowl

large hogie roll covered in cheese filled with slow cooker mushroom and onion italian beef on a wooden table as viewedclose up.

Slow Cooker Mushroom and Onion Italian Beef

This beef is slow cooked with Italian herbs, mushrooms, and onions. It's perfect as a nice sub sandwich and as a main dish.
5 from 2 votes
Print SaveSaved! Rate
Course: Main Course
Cuisine: American
Keyword: Beef Dip, crockpot, Rump Roast, slow cooker, Sub
Prep Time: 5 minutes
Cook Time: 8 hours
Total Time: 8 hours 5 minutes
Servings: 6
Calories: 744kcal
Author: lyuba

Ingredients

  • 2.75 - 3 lbs rump roast
  • 1 large yellow onions
  • 8 oz baby portobello mushrooms
  • 1 lb garlic bulb
  • 1 tsp crushed red pepper flakes more or less depending on your spicy tolerance
  • 1/2 Tbsp dry oregano
  • 1 Tbsp dry thyme
  • 2 Tbsp dry parsley
  • 2 Tbsp dry basil
  • 1/2 Tbsp white granulated sugar
  • 1 tbsp coarse or sea salt more or less to taste
  • 1 tbsp freshly ground black pepper
  • Beef stock enough to just over the beef about 4-5 cups
US Customary - Metric

Instructions

  • Heat up stock and stir in dry herbs, salt, red pepper flakes, and sugar.
  • Place rump roast into the slow cooker and poke some holes all over the roast using a small knife, about 1 1/2 inches deep. Peel garlic cloves and stick individual garlic cloves into the holes.
  • Slice onion and mushrooms, not to thin, and add them into the slow cooker.
  • Pour prepared stock mixture all over the beef and veggies.
  • Close the lid and cook on low for 8-10 hours.
  • Take the beef out once it's done and shred it using two forks.
  • Take onions and mushrooms out of the liquid using a slotted spoon and mix them in with shredded beef.
  • Save juices from cooking beef for dipping.

Nutrition

Calories: 744kcal | Carbohydrates: 30g | Protein: 103g | Fat: 22g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 9g | Cholesterol: 270mg | Sodium: 266mg | Potassium: 2007mg | Fiber: 3g | Sugar: 3g | Vitamin A: 165IU | Vitamin C: 26mg | Calcium: 245mg | Iron: 11mg
Tried this recipe?Mention @willcookforsmiles and tag #willcookforsmiles

Mushroom and Onion Italian Beef sub with au jus sauce in a white bowl

Mushroom and Onion Italian Beef sub on a cutting a board

 

photo collage 1st photo Mushroom and Onion Italian Beef sub and au jus sauce in a white bowl, 2nd photo full beef in slow cooker, 3rd photo cooked beef in a bowl, 4th phot is sandwich being dipped in sauce that is in small white bowl

SOME MORE RECIPES FROM ME:

2 Beef Enchiladas Verde on a white plate with a fork to the right side and the rest of the enchiladas in a brown casserole dish

Beef Enchiladas Verde

Slow Cooker Winter Squash Beef Stew in a orange bowl with a sprig of rosemary

Slow Cooker Winter Squash Beef Stew

White BBQ Chicken Sub on a wood table with a bowl of the clear bbq sauce

White BBQ Chicken Sub

LYUBA

ABOUT LYUBA

I’m Lyuba Brooke, mother of 2, the cook, recipe developer, photographer, and author behind willcookforsmiles.com. I share many classic and original recipes, cooking tips, and tutorials. My passion is sharing delicious meals for everyone to try. Read more...

1.2K shares

Filed Under: 30 Minute Meals, Beef, Dinner, Sandwich, Slow Cooker Tagged With: crock pot, slow cooker, sub

All images and text ©Lyubov Brooke for ©Will Cook For Smiles. Please do not use my images without prior permission. If using my posts in collections and features, please link back to this post for the recipe. Disclaimer: Nutrition information shown is not guaranteed to be 100% accurate as most ingredients and brands have variations.

Comments

  1. Jo says

    January 6, 2023 at 12:28 pm

    5 stars
    Great beef for sandwiches and wraps! I add extra garlic and mushrooms for myself

    Reply
    • LyubaB says

      January 9, 2023 at 12:33 pm

      Glad you liked it!

      Reply
  2. Robin says

    January 18, 2023 at 10:17 am

    5 stars
    This is an easy recipe that is so good!

    Reply
  3. Julie says

    February 3, 2023 at 5:20 pm

    Can this be made ahead and frozen?

    Reply

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Well, hey there!

I’m Lyuba Brooke, mother of 2, the cook, recipe developer, photographer, and author behind willcookforsmiles.com. I share many classic and original recipes, cooking tips, and tutorials. My passion is sharing delicious meals for everyone to try. Read More.

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