Keto Sautéed Butter and Garlic Mushrooms

Name: Keto Sautéed Butter and Garlic Mushrooms
Prep time: 5 min
Cook time: 10 min
Yield: 4
Cuisine: American
Ingredients: 500 g (about 4 cups) whole mushrooms; 1 small onion, sliced; 5 cloves garlic, minced; 1/4 cup butter; 2 tablespoons lemon juice; 1 teaspoon olive oil; 1 teaspoon fresh rosemary leaves; salt and pepper to taste

By Annie Lampella, Pharm.D.

Published November 8, 2020 • Updated June 2, 2025

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Reader Rating

4.7 Stars (3 Reviews)

Easy Kid Friendly

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Looking for a side dish which is both low in carbs and packed with flavor? These keto sautéed mushrooms are the perfect addition to any dish!

a mushroom side dish on the table with rosemary

15 Mins

Nutrition Facts

Servings

148

Calories

12.2g

Fat

3.2g

Protein

4.4g

Net Carb

4.9g

Total Carbs

Disclaimer: The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.

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Keto Sautéed Butter And Garlic Mushrooms Ingredients

500 g (about 4 cups) whole mushrooms
1 small onion, sliced
5 cloves garlic, minced
1/4 cup butter
2 tablespoons lemon juice
1 teaspoon olive oil
1 teaspoon fresh rosemary leaves
salt and pepper to taste

Keto Sautéed Butter and Garlic Mushrooms Directions

STEP

1

Heat it up

Heat a large cast iron over medium heat and melt butter with oil. Cook onion until tender then add mushrooms.
STEP

2

Cook & add lemon juice

Cook onion until tender then add mushrooms. Cook for about 5 minutes until golden brown. Pour lemon juice and cook for about 4 minutes.
STEP

3

Rosemary & garlic

Add rosemary and garlic in the pan. Stir and cook for 30 seconds. Adjust taste with salt and pepper.

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Low Carb Butter & Garlic Sautéed Mushrooms Recipe

sauteed mushrooms in a cast iron skillet with a wooden spoon

Keto sautéed mushrooms make for the perfect low carb side dish with any main meal! With Thanksgiving and Christmas coming up, this recipe makes for the perfect holiday side dish as it is both keto friendly and also vegetarian, meaning it can be served to your non meat eating guests as well. These tender, buttery mushrooms will take your holiday dinners to the next level and the best part is that they are a very easy keto side dish to make! The mushrooms are sautéed in butter and rosemary, but you can swap out the butter to olive oil to make the recipe vegan and also swap the rosemary out for thyme if you prefer the taste of it.

Some keto dish ideas which sautéed mushrooms pair well with are fish fillets, pork chops, keto bbq chicken or even lemon herb whole chicken. This keto butter garlic mushrooms recipe is packed with flavor and they are sautéed to the perfect texture! They are surely to impress anyone you serve them to! For this keto mushrooms recipe, you will only need ingredients which typically can be found in most pantries, so you won’t even need to run out to the supermarket!

mushrooms lemon rosemary onion ingredients

Are Mushrooms Keto?

Yes, mushrooms are keto friendly. Mushrooms are incredibly low in carbs, while also having protein in them. In one cup of white mushrooms there is around 1.6g net carbs. Mushrooms are very versatile as they can be used in many different recipes. They are also very high in potassium and contain b-vitamins, making them a great healthy addition to a keto diet. Mushrooms are especially great to have for anyone who’s following a vegetarian Keto diet as they have a meaty texture, contain protein, and are also low carb.

buttery mushrooms and onions in a bowl with lemon and rosemary near

How Long Does It Take To Sauté Mushrooms?

This is a quick and easy keto side dish to make. It is not time consuming at all as it only takes around 8-9 minutes to sauté the mushrooms, making it also the perfect side-dish to add to a weeknight dinner!

Sliced or Whole Mushrooms

You can either slice the mushrooms or leave them whole, it’s up how you prefer to serve them. The only difference is slicing them will decrease the cooking time and you will have to watch them carefully so as to make sure that they don’t overcook. If slicing, make sure they are the same thickness for even cooking.

How to Store Keto Sautéed Mushrooms

Sautéed mushrooms should be stored in the fridge for 3-5 days. Whenever you wish to serve them, reheat the mushrooms in the microwave or in a hot skillet until heated thoroughly. You may need to add some more broth or butter to keep them from drying out. These keto sautéed mushrooms can also be frozen for up to 9 months, but freezing them makes them tougher, so they are then best used in a frittata or added to keto lasagna once thawed.

Keto Sautéed Butter and Garlic Mushrooms: FAQS

Can I use different types of mushrooms for this recipe?

Absolutely! While the recipe calls for whole mushrooms, you can use any variety you like, such as cremini, shiitake, or button mushrooms. Just keep in mind that different mushrooms may impart slightly different flavors.

What can I substitute for butter to make this dairy-free?

If you need a dairy-free option, you can use coconut oil or a plant-based butter substitute. Just keep in mind that this may alter the flavor slightly, but it will still be delicious!

How should I store leftovers of the sautéed mushrooms?

Store any leftovers in an airtight container in the refrigerator for up to 3 days. You can reheat them in a skillet over low heat or in the microwave.

Can I make this recipe ahead of time?

Yes! You can prepare the sautéed mushrooms ahead of time and store them in the refrigerator. Just reheat them gently before serving to maintain their texture and flavor.

Is this recipe suitable for meal prep?

Definitely! These keto sautéed mushrooms are great for meal prep. They pair well with various proteins and can easily be added to salads or bowls throughout the week.

Nutritional information & Macros

Amount Per Serving
Calories	148
Fat	12.2g
Protein	3.2g
Total Carbs	4.9g
Net Carbs	4.4g

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About Annie Lampella, Pharm.D.

Annie Lampella is a Doctor of Pharmacy, mom, and the recipe creator behind KetoFocus. With a B.S. in Genetics from UC Davis and a Pharm.D., she has over 11 years of experience developing family-friendly keto recipes based on the science of human metabolism. She is the author of the Protein Packed cookbook, published by Victory Belt Publishing.

Learn more about Annie →

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