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Slow Cooker Herbed Mushrooms and Onions

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By Sarah Olson

7 Comments

Jun 29, 2020Updated Jan 27, 2024

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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! If you are looking for a creamy version, try my Slow Cooker Creamy Tuscan Mushrooms.

Table of Contents

• How to make mushrooms and onions in the slow cooker:
• How long do I cook?
• What can I serve this on?
• More summer recipes to try in your slow cooker:
• Slow Cooker Herbed Mushrooms and Onions Recipe

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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

How long do I cook?

• Place the lid on the slow cooker.
• Cook on HIGH for 4 hours or LOW for 7.

What can I serve this on?

• Grilled Steak – Recipe by Bobby Flay
• Barbecued Chicken
• Hamburgers
• Baked Potatoes

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

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Slow Cooker Herbed Mushrooms and Onions

5 from 1 vote

Prep Time: 10 minutes mins

Cook Time: 4 hours hrs

Total Time: 4 hours hrs 10 minutes mins

Servings: 10

By: Sarah Olson

Buttery and seasoned mushrooms and onions for topping your favorite main dishes.

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Equipment

• Slow Cooker- 6 quart or larger (I own and use this one from Crock-Pot)

Ingredients 

US CustomaryMetric

 

1x2x3x

• ▢ 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

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!

Sarah’s Notes

What can I put this on?

• Grilled Steak
• Barbecue Chicken
• Hamburgers
• Baked Potatoes

 

Nutrition

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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