Slow Cooker Mushroom Rice

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Slow Cooker Mushroom Rice with mushrooms, caramelized onions and thyme is a deliciously buttery addition to your holiday meals! Stovetop directions too.

Slow Cooker Mushroom Rice made with mushrooms, caramelized onions and thyme is a deliciously buttery easy addition to your holiday meals! Stovetop directions too.

Slow Cooker Mushroom Rice is my official entry into the holiday recipes season. I actually had intended to share this recipe last year when I posted my Perfect Garlic Prime Rib and Roasted Garlic Butter Mushrooms but I was a little late to the game and everyone was over the holiday recipes.

This year I’m jumping the gun and giving you holidays in SEPTEMBER. This Mushroom Rice is going to be a welcome addition to your family meals, I promise. Assuming of course you like mushrooms, haha.

This Mushroom Rice is so good my husband actually requests it and he normally is not a mushroom fan. I can’t think of any higher compliment to give this dish. A guy who normally says things like “It was great…except for the mushrooms” enjoyed a second helping of this recipe.

This isn’t a cream of mushroom soup rice, but if you are looking for a cream of mushroom soup recipe I have a condensed version too.

Slow Cooker Mushroom Rice with mushrooms, caramelized onions and thyme is a deliciously buttery addition to your holiday meals! Stovetop directions too.

Tips for this Slow Cooker Mushroom Rice:

  • BUTTER. Butter and mushrooms should basically get married because together they taste like heaven. Use butter to brown those mushrooms and onions.
  • Use a good pot. I used a dutch oven made with cast iron and it doesn’t have to be expensive. When making a double recipe I use my slow cooker insert to brown those mushrooms.
  • You don’t have to, but adding a tablespoon of butter to the slow cooker gives the rice a deliciously rich texture and keeps it moist.
  • I use a regular long grain rice, you can certainly use brown rice as well – cook on high for 3 hours.
  • I use dried thyme for the recipe, fresh thyme would also be delicious and make a great garnish as well.

Slow Cooker Mushroom Rice will be a family favorite!

One Pot Stovetop Mushroom Rice? YES. I’ve got you covered.

Looking for more side dishes?

Tools Used in the making of this Slow Cooker Mushroom Rice:
Slow Cooker: Love this slow cooker and how programmable it is, it has been a workhorse for me… until…
My New Slow Cooker: This recipe was made in this slow cooker. For larger roasts I also brown the meat in the insert and not lose a bunch of the flavor by transferring the meat and leaving the browned bits behind. If you’re thinking of a new slow cooker, consider it if your budget is open.
Better Than Bouillon: I almost never buy boxes of broth because I keep the beef, chicken and vegetable version of this Better Than Bouillon.
Mushroom Base: Made from the same people above, this is an easy way to pump up the mushroom flavor. Also helps if you’re using white mushrooms. It is much cheaper than buying by the box and you don’t have to worry about an opened box going bad in the fridge.
Cast Iron Skillet: This is my most used pan in my kitchen, heavy, keeps heat well and gives the BEST sear ever.



Slow Cooker Mushroom Rice

5 from 5 votes
  • Yield: 8 Servings
  • Prep Time: 10 minutes
  • Cook Time: 2 hours
  • Total Time: 2 hours 10 minutes
  • Course: Side Dish
  • Cuisine: American
  • Author: Sabrina Snyder
Slow Cooker Mushroom Rice with mushrooms, caramelized onions and thyme is a deliciously buttery addition to your holiday meals! Stovetop directions too.


  • 3 tablespoons butter divided
  • 1 pound crimini mushrooms sliced
  • 1 yellow onion diced
  • 2 cloves garlic minced
  • 1/2 teaspoon Kosher salt
  • 1/4 teaspoon coarse ground pepper
  • 1/2 teaspoon dried thyme or 1 teaspoon fresh thyme
  • 2 cups rice
  • 4 cups vegetable or beef broth


Note: click on times in the instructions to start a kitchen timer while cooking.

  1. In a heavy bottomed pot add 2 tablespoons of butter and the mushrooms.
  2. Cook on medium high for 3-5 minutes or until they start to caramelize.

  3. Stir and cook an additional 3 minutes.

  4. Remove the mushrooms and put them into the slow cooker.
  5. Add in the onions, salt, pepper and thyme along with the last tablespoon of butter and cook on medium for 3-5 minutes or until they start to turn golden brown.

  6. Add in the garlic, stir and cook for 1 minute.

  7. Scrape the onion garlic mixture into the slow cooker.
  8. Add in the rice and broth.
  9. Cook on high for 2 hours.

Nutrition Information

Yield: 8 Servings, Amount per serving: 234 calories, Serving Size: 1 , Calories: 234g, Carbohydrates: 41g, Protein: 6g, Fat: 4g, Saturated Fat: 2g, Cholesterol: 11mg, Sodium: 635mg, Potassium: 392mg, Fiber: 1g, Sugar: 1g, Vitamin A: 130g, Vitamin C: 1.2g, Calcium: 36g, Iron: 0.9g

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Keyword: Slow Cooker Mushroom Rice
Slow Cooker Mushroom Rice with mushrooms, caramelized onions and thyme is a deliciously buttery addition to your holiday meals! Stovetop directions too.
Slow Cooker Mushroom Rice made with mushrooms, caramelized onions and thyme is a deliciously buttery easy addition to your holiday meals! Stovetop directions too.

About the Author

Sabrina Snyder

Sabrina is a professionally trained Private Chef of over 10 years with ServSafe Manager certification in food safety. She creates all the recipes here on Dinner, then Dessert, fueled in no small part by her love for bacon.

See more posts by Sabrina

Dinner, then Dessert, Inc. owns the copyright on all images and text and does not allow for its original recipes and pictures to be reproduced anywhere other than at this site unless authorization is given. If you enjoyed the recipe and would like to publish it on your own site, please re-write it in your own words, and link back to my site and recipe page. Read my disclosure and copyright policy. This post may contain affiliate links.


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  1. I put in crockpot 2 hrs high did exactly as directed. Unfortunately rice wasn’t all fully cooked and came out gluey. Was there a particular long grain I was supposed to use?

    1. I used regular long grain rice but brown rice would work as well, though will need an extra hour of cook time.

  2. I made this twice for the holidays. Once with family and another time with friends. It was delicious! Everyone enjoyed it. So easy to make, effortless! Thanks so much for the recipe. It’s a keeper for future meals!

  3. Hi, I want to make this for supper tonight, but my crockpot settings are Hi 4hrs and 6hrs and Low 8hrs and 10hrs. Will cooking on Hi at the 4hr setting be sufficient to cook the rice in 2hrs? Thanks!

    1. That should work. I’m not familiar with your slow cooker but unless it takes 4 hours to get to temp (which I doubt) it should be fine. Let me know how it turns out!

  4. Hello I am planning on making this for a family reunion and have some beautiful brown and wild rice from Wisconsin, if using brown/wild rice mix is there any adjustment I need to do? Thank you in advance for your help and time.

    1. That sounds amazing but the cooking time on wild rice is completely different and I haven’t had the chance to test it out in a slow cooker. Stay tuned in the future.

  5. I have stomach troubles and I would like to know if you have anything that doesn’t have a hot and very little strong spices in it. I’m so tired of seeing these Great recipes but I can’t eat them. But I don’t want to lose the great taste.

    1. I’m so glad you’re enjoying the recipes. With each one, you can always adjust the seasoning to your liking. I usually try and make most of the recipes to fit the middle ground of spice and then everyone can adapt to their preference. Hope this helps!

  6. I modified this to go in my rice cooker…. it smells so yummy! (just put it in the cooker now). Instead of using the slow cooker, i put everything in my rice cooker and pressed the start button. Should take it roughly 30 minutes, i expect. I think this side dish is going to taste great with the smoked sausage I am going to fry up. I think I’ll use the same pan that I cooked the mushrooms and onions in, to spread the flavor love around. Thanks for sharing this recipe!

  7. Hi,

    I really want to make this, but I always get confused over measurements in ‘Cups’.

    Are you able to advise the rice & stock in grams and ML?

    Also I would need this for around 14 people, would you recommend doubling the ingredients?

    Many Thanks

    1. To convert the recipe as written, you’ll want to use 370 grams of rice and 960 grams of stock. I would recommend doubling the recipe for that many people but you may need to make it in 2 slow cookers to accomdate the ingredients. Hope this helps!

  8. What size of slow cooker did you use for this recipe? I have a 7 quart so will probably have to double or triple it I’m assuming.

  9. The recipe was awesome! My husband and I loved the flavors, but I would probably cut the cook time down to 2 to 2 and half hours instead of 3. The rice was cooked a little to long at 3 hours but other than that…phenomenal!!! Will definitely make again. Thanks


    1. I’ve never tested it so I’m not sure if it would work or not. If you decide to try, I’d love to know how it turned out. Thanks!

  10. I can totally see why your hubby requests this (and I AM a mushroom fan!). I think it’s just an absolutely brilliant idea to use the slow cooker for this, but I also love that you included stovetop directions as an alternative – that’s so helpful, whatever equipment someone might have on hand. Great post!

  11. since i don’t own a slow cooker, ( there is just two of us) may i use a casserole baking dish? that is covered in the oven? And how long would i cook this?

  12. Good morning! So I’m a microwave queen, my mother tried to teach me how to cook I just wasn’t interested. However now I’m trying to be better about it. I love your recipes although sometimes I don’t get it lol. Anyway, can I add dark meat chicken to this recipe? If so how???? Thanx in advance!