Keto Mushroom Soup

This creamy keto mushroom soup recipe is made with brown butter and sage for delicious rich flavor. Easy to make and with only 5 ingredients, it's a perfect keto soup recipe for those chilly days.

Recipe Print

Keto Mushroom Soup in a black bowl with a spoon resting in it.

This creamy keto mushroom soup recipe is made with brown butter and sage for delicious rich flavor. Easy to make and with only 5 ingredients, it’s a perfect keto soup recipe for those chilly days.

This Keto Mushroom Soup Recipe was first published in December 2012. But it’s such a lovely and easy soup, I decided it needed a little update. I’ve even included a video to show you just how easy it is to make.

Making cream of mushroom soup is so easy, I honestly don’t know why anyone would use store-bought. It takes less than 20 minutes to make and it’s so much more flavorful.

And cooking the mushrooms in brown butter makes it truly unique and special. No pre-made soup can compare.

If you love simple soup recipes, be sure to check out Instant Pot Cauliflower Soup, Roasted Tomato Soup, and Italian Sausage Soup.

A cup of keto mushroom soup in a black bowl with fresh sage on top.

You need to try this recipe!

Step away from the canned soup, people! And make my simple keto mushroom soup instead. It takes only 5 ingredients and is so much healthier, with a richer, fresher flavor. Let’s do a little comparison, shall we?

The typical canned mushroom soup contains some pretty scary ingredients. Most of them are made with things like soybean oil, wheat flour, and MSG. Even the so-called healthier, organic brands have additives like rice flour to thicken it.

Kettle and Fire does make a decent keto friendly soup in cartons. The ingredients aren’t scary (yay!), but it’s rather expensive. And it has quite a long ingredient list for what should be a simple soup.

My recipe, on the other hand, is thick, creamy, and contains 5 simple ingredients. It doesn’t cost a fortune to make and I guarantee you that the flavor is far superior to that of anything from a can or a carton.

Reader Testimonials

“I now make this quite often. It is delicious with every spoonful. Thank you Carolyn for all your wonderful and delicious recipes!” — Jennifer

“Incredibly better than any cream of mushroom soup I’ve ever eaten. It took me no time to make it. We’ll be serving it often! Thnx for your skills and generosity. I recommend you to my friends, family & strangers all the time!!” — Ludona

“Thank you so much for this amazing soup. I’d missed cream of mushroom soup for years. But this is lightyears ahead of it. It is truly my comfort soup!” — Tracy

Ingredients you need

Top down image of the ingredients needed for keto mushroom soup.

Butter: Choose a good quality salted butter as the browned butter is what makes this recipe unique.
Mushrooms: You can use white mushrooms or baby bellas. To save on time, get them pre-sliced.
Fresh sage: I can’t emphasize enough how much flavor comes from fresh sage in this dish. You could use 1/2 tsp dried sage or try it with fresh thyme or rosemary if you prefer.
Broth: I like to use homemade chicken bone broth for this soup but cartoned broth is fine too. You can also use vegetable broth for a vegetarian meal.
Heavy cream: This makes the soup thick and creamy. For a dairy free option, use full fat coconut milk or coconut cream.
Salt and pepper

Step-by-step directions

A collage of 6 images showing how to make Keto Mushroom Soup.

1. Brown the butter: In a large pot, heat the butter over medium heat until it begins to brown and turns fragrant, 3 to 4 minutes. Add the sage and cook one minute more.

2. Sauté the mushrooms: Add the mushrooms and stir to coat, then sauté until the mushrooms are tender and lightly browned, 4 to 5 minutes.

3. Add the broth. Stir in the broth and bring to a simmer. Cook 4 to 5 minutes more.

4. Blend it up. Transfer the soup to a food processor or good blender and blend until smooth (you may need to work in batches). You can also use an immersion blender but it tends not to get it as smooth.

5. Add the cream. Return the soup to the pot and stir in the cream. Serve immediately.

A spoon lifting a spoonful of keto mushroom soup away from the bowl.

Expert Tips

Don’t skip the browned butter, as it’s what makes this Keto Mushroom Soup recipe so special. Browned butter has a rich, nutty caramel flavor and it goes beautifully with mushrooms and herbs.

Store any leftovers in an air tight container in the fridge for up to a week, as long as your cream was fresh. Since milk fat separates when it freezes, I don’t suggest freezing leftovers. But you can freeze the soup minus the cream and then add the cream when you re-heat it.

If you want a chunkier soup, don’t purée completely or set aside a portion of the mushrooms and add them to the puréed mixture afterwards.

Dairy-Free Option: Use coconut milk for the heavy cream. If you can tolerate ghee, there is a browned butter ghee that would be great. Otherwise use butter-flavored coconut oil.

Top down image of a black bowl filled with keto mushroom soup, with a mushroom floating on top.

Frequently Asked Questions

Can you eat cream of mushroom soup on keto?

The cream of mushroom soup you purchase from the grocery store is not keto friendly at all. They often contain high carb fillers and thickeners, along with other questionable ingredients. However, this keto mushroom soup recipe is very low carb and it tastes so much better. And it’s super thick and creamy!

Are mushrooms keto friendly?

All varieties of mushrooms are naturally low in carbohydrates. So they make an excellent addition to keto recipes. They add flavor, but they also contain a number of vital nutrients and minerals such as Vitamin D.

How many carbs are in keto mushroom soup?

This keto mushroom soup recipe has 4.6g of carbs and .6g of fiber per serving. That comes to 4g net carbs per cup of soup.

More Delicious Keto Mushroom Recipes

Banner showing Keto Soups and Stews Cookbook.

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