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The Magical Slow Cooker » Recipes » Side Dishes » Slow Cooker Herbed Mushrooms and Onions

Slow Cooker Herbed Mushrooms and Onions

by Sarah Olson on June 29, 2020 | Updated May 24, 2022 7 Comments

3875 shares
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cooked mushrooms and onions in a buttery sauce in slow cooker

These Buttery Slow Cooker Herbed Mushrooms and Onions are a great topping for burgers, a must for summer barbecues!

We love easy summer recipes like this one. We make this steak topping along with Slow Cooker Jalapeno Corn for an easy dinner!

Cooked mushrooms and onions in the slow cooker in a buttery sauce.

Slow cooked onion and mushrooms are amazing and easily done right in the slow cooker. Top a burger or steak with these buttery vegetables.

How to make mushrooms and onions in the slow cooker:

  • Mushrooms – sliced button mushrooms
  • Onions – sweet yellow onions
  • Butter – salted butter (this helps make a rich sauce)
  • Garlic – minced
  • Seasonings – basil, thyme, salt and pepper
onion, mushrooms, seasonings and butter in the slow cooker, uncooked.

How long do I cook?

  • Place the lid on the slow cooker.
  • Cook on HIGH for 4 hours or LOW for 7.
cooked mushrooms and onions in slow cooker.
800

What can I serve this on?

  • Grilled Steak – Recipe by Bobby Flay
  • Barbecued Chicken
  • Hamburgers
  • Baked Potatoes
hamburger with mushrooms and onions on top.

More summer recipes to try in your slow cooker:

  • Slow Cooker Apple Barbecue Pork Loin
  • Slow Cooker Caramelized Onions
  • Slow Cooker Garlic Confit
  • Slow Cooker Peachy Barbecue Ribs
  • Slow Cooker Milk and Honey Corn on the Cob
  • Slow Cooker Root Beer Chicken

Want to make more magic in your crockpot? Stay up to date and subscribe to my newsletter and follow along on Facebook, Instagram, Pinterest and YouTube.

cooked mushrooms and onions in a buttery sauce in slow cooker

Slow Cooker Herbed Mushrooms and Onions

5 from 6 votes
Buttery and seasoned mushrooms and onions for topping your favorite main dishes.
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Course: Main Course, Side Dish
Cuisine: American
Prep Time: 10 minutes
Cook Time: 4 hours
Total Time: 4 hours 10 minutes
Servings: 10
Calories: 117kcal
Author: Sarah Olson

Equipment Needed:

  • Slow Cooker- 6 quart or larger

Ingredients:

  • 4 cups sliced sweet yellow onion I used 2 large onions
  • 4 cups sliced mushrooms
  • 1/2 cup salted butter sliced
  • 1/2 tsp. dried oregano
  • 1/2 tsp. dried thyme
  • 1/2 tsp. sea salt
  • 1/2 tsp. coarse ground black pepper
  • 2 garlic cloves minced
US Customary – Metric

Instructions:

  • Add the onions and mushrooms into the slow cooker. Add the sliced butter, seasonings, and garlic.
  • Cover and cook on HIGH for 4 hours without opening the lid during the cooking time.
  • Serve and enjoy!
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Recipe Notes:

What can I put this on?
  • Grilled Steak
  • Barbecue Chicken
  • Hamburgers
  • Baked Potatoes
 

Nutrition Information:

Calories: 117kcal | Carbohydrates: 8g | Protein: 2g | Fat: 9g | Saturated Fat: 6g | Cholesterol: 24mg | Sodium: 202mg | Potassium: 216mg | Fiber: 2g | Sugar: 3g | Vitamin A: 284IU | Vitamin C: 6mg | Calcium: 21mg | Iron: 1mg

Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.

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    3875 shares
    • 2960

    Filed Under: Beef, Camping, Side Dishes

    Comments

    1. Shangra says

      January 10, 2021 at 4:09 pm

      5 stars
      Made this to put on steak and froze small containers of it. I’ve made this before and frozen ones were just as good.

      Reply
      • Sarah Olson says

        January 10, 2021 at 6:16 pm

        Good to hear Shangra!

        Reply
    2. LarryD says

      July 20, 2020 at 2:24 pm

      My Daughters & I loved this, we were cooking it up & putting it on everything.

      So I decided to add 2.5 lb of beef roast cut into 1 in cubes & browned to the recipe.

      WOW!

      Reply
      • Sarah Olson says

        July 20, 2020 at 4:17 pm

        Such a great idea!

        Reply
    3. Lisa says

      January 15, 2020 at 2:04 pm

      Can you cook chicken breast in this?

      Reply
      • Sarah Olson says

        January 15, 2020 at 2:40 pm

        Yes! That’s a great idea.

        Reply
    4. kellysparklesshoes says

      June 28, 2016 at 6:46 pm

      These look and sound amazing, yum!

      Reply

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