Slow Cooker Mushroom Onion Beef

Savory Slow Cooker Mushroom Onion Beef is a hearty dish with little fuss and big taste.Because of winter store Titan, school has been cancelled again. The weather people were forecasting 2-4 inches of snow and utter chaos. Checked the backyard this morning – yeah, 1 inch of snow. At this rate, Megan will be going to school until July.

Ok, I’m done. Wasn’t even a rant, just a tiff. You know, kinda like winter storm Titan. 🙄

I’m so excited to share this super tasty recipe with you. Slow Cooker Mushroom Onion Beef is an accidental recipe. I didn’t have the ingredients for another recipe, so I got to play. OH EM GEE, I’m so glad I was out of those ingredients.

Slow Cooker Mushroom Onion Beef has great potential to become the base for many recipes.
– My veggie loving friends could add broccoli, carrots and any other veggies they enjoy.
– My spicy friends would enjoy Sriracha sauce to turn up the heat.
– Finally, yummy red potatoes sound terrific for my next go-round with this dish.

Slow Cooker Mushroom Onion Beef

Rating: 51

Prep Time: 10 minutes

Cook Time: 4 hours

Total Time: 4 hours, 10 minutes

Yield: 8-10 Servings

Serving Size: 3 ounces

Allergies: Dairy

Slow Cooker Mushroom Onion Beef

Savory Slow Cooker Mushroom Onion Beef is a hearty dish with little fuss and big taste.


  • 2 Pounds Stew Meat (or 1" cubes of any steak)
  • 1/2 Cup Margarine
  • 1 Tablespoon Beef Better Than Bouillon (*See Notes for substitutes.)
  • 1/2 teaspoon Garlic Powder
  • 1 Onion, chopped or 2 Tablespoon Dried Minced Onions
  • 2 teaspoons Onion Powder
  • 1 Clove Garlic, minced or 1/2 teaspoon Garlic Powder
  • 1/2 teaspoon Basil
  • 1/2 teaspoon Salt
  • 1/4 teaspoon Black Pepper
  • 1/4 teaspoon Turmeric
  • 1-8 oz. Can Sliced Mushrooms or 2 Cups Fresh Mushrooms, sliced
  • 1/4 cup cornstarch
  • 1/4 cup cold water
  • Hot Cooked Egg Noodles or Rice


  1. Place the beef, mushrooms and onion in a 5-qt. slow cooker.
  2. In a microwave safe dish/cup melt margarine. Add bouillon to margarine; stir to dissolve. Add onion powder, garlic powder, basil, salt, pepper, turmeric to broth; mix.
  3. Pour margarine mixture over meat. Stir meat to coat; mix well.
  4. Cook for 4-6 hours on LOW setting. Stir once, halfway. If using HIGH temperature and meat appears to be getting done quickly, turn down to LOW.
  5. Combine cornstarch and water until smooth; stir into meat mixture. Cover and cook on high for 15 minutes or until thickened.
  6. Serve over egg noodles or rice.


* 1 Tablespoon beef bouillon granules or ground up bouillon cubes can be substituted for Better Than Bouillon.

Do not add water - stew meat will produce plenty of moisture.

Savory Slow Cooker Mushroom Onion Beef is a hearty dish with little fuss and big taste.

This recipe was featured at:
Featured on Morsels of Life: Five Friday Finds

This post may or may not have been linked at these Fabulous Parties!


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Stacy is the mother of 3, step-mom of 3 and grandparent of 3. She retired as a project manager for a environmental laboratory. In her spare time she volunteers with her daughter's high school band. She has been developing websites for over 15 years, both for herself and others. Cooking, sewing, reading and history are just a few of her passions. Reading about history is a double passion!


  1. I just bought some stew beef today and this looks like the perfect way to use it up. Thank you for sharing at Simple Supper Tuesday.

  2. this looks so good, so have to try this and know hubby will be delighted. thanks for sharing.

  3. Hi Stacy,
    Your Slow Cooker Mushroom Onion Beef looks delicious, we would just love it, especially on that yummy bed of noodles. This is pure comfort food. Thanks so much for sharing with Full Plate Thursday and come back soon!
    Miz Helen

  4. Looks like you saw you were featured on Five Friday Finds already! 🙂 Hope you can stop by again this week. 🙂

    • I was very excited to see the feature! This is one of our favorite meals and I’m happy it got a little loving. ~Have a good weekend, Stacy

  5. This looks delicious! I’d love for you to link it, or any other recipe up at my recipe link-up here! Everyone gets pinned!

  6. Oh I love another great recipe for the Slow Cooker,I never can resist one! This looks absolutely delicous! Thanks so much for sharing on The Yuck Stops Here this week! Hope to see you back next week, we’ll be starting the party on Tuesday evening at 6pm ET instead of Monday from now on! HUGS

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