Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (2024)

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This delicious Low-Carb Green Bean and Mushroom Casserole recipe is perfect for the holidays! It can be a part of a low-carb, LC/HF, keto, Atkins, diabetic, or Banting diet.

Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (2)

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This Low-Carb Green Bean and Mushroom Casserole is loaded with green beans and mushrooms in a cheesy creamy sauce scented with garlic and onions. More cheese on the top adds even more parmesan goodness!

I was inspired to create this recipe by THE green bean casserole recipe. You know the one–It finds its way into every reunion, onto every Thanksgiving table, and into every pot-luck dinner. This onion-topped tradition is an old standby recipe that may just be more American than apple pie.

Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (3)

Of course, the traditional recipe made with a can of soup and fried onions doesn’t quite work with a low-carb diet, so I went to work in the kitchen. I can’t have my followers missing out on a green bean casserole this Thanksgiving!

My version uses real sliced mushrooms and a creamy sauce made from parmesan and garlic infused cream cheese. Instead of using fried onions on top, I put the onion flavor in the sauce using onion powder instead of onions to keep the carb count down. That doesn’t mean that the top of the casserole is boring! Lots of grated parmesan crowns this casserole with cheesy goodness.

Don’t miss out on green bean casserole this holiday season! Go ahead–celebrate the holidays with this low-carb version of an American tradition! Enjoy!

-Annissa

PS: Don’t forget to check out our other recipes that are perfect for the holidays! Our pecan stuffing, cranberry sauce, and pumpkin mousse pie are sure to make your Thanksgiving special! This easy keto cranberry sauce from Keto Cooking Wins and a ham made with this sugar free ham glaze from My Life Cookbook will also add goodness to your holiday table.

Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (4)

Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (5)

This delicious low-carb and keto-friendly Green Bean Casserole recipe is perfect for the holidays! 😋❤️🍴

Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (6)

5 from 5 votes

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Low-Carb Green Bean, Mushroom, and Parmesan Casserole

This delicious Low-Carb Green Bean and Mushroom Casserole recipe is perfect for the holidays! It can be part of a low-carb, LC/HF, keto, Atkins, diabetic, or Banting diet.

Course Side Dish

Cuisine American

Prep Time 15 minutes

Cook Time 35 minutes

Total Time 50 minutes

Servings 9

Author Annissa Slusher

Ingredients

  • 1 pound green beans fresh or frozen, sliced into 1-2 inch segments.
  • 2 tablespoons butter
  • 8 ounces mushrooms sliced
  • sea salt
  • black pepper freshly ground
  • 8 ounces cream cheese room temperature
  • 1 tablespoon white wine vinegar
  • 2 cloves garlic peeled and crushed
  • 1 1/2 teaspoon onion powder
  • 1/2 cup chicken or vegetable stock low salt
  • 1/4 teaspoon sea salt or to taste
  • 1 cup parmesan cheese finely grated, quantity divided

Instructions

  1. Preheat oven to 350º Fahrenheit. Prepare a 8" X 8" baking pan by spraying it with coconut oil spray or greasing with butter.

  2. Fill lower part of steamer with 1 1/2 to 2 inches of water. Bring water to a simmer.

  3. When water has reached a simmer, place green beans in the top portion of the steamer. Sprinkle lightly with salt. Cover and place over the simmering water in the lower portion of the steamer. Steam beans until crisp-tender--about 8-10 minutes. Transfer beans to the prepared baking pan.

  4. Heat a large skillet over medium-high. Add butter. When butter has melted and has stopped foaming, add mushrooms. Lightly season mushrooms with salt and pepper.

  5. Cook mushrooms, stirring occasionally, until tender--about 5 minutes. Transfer to baking dish.

  6. Meanwhile, In a large mixing bowl, whip cream cheese with a mixer until smooth. Blend in vinegar, garlic, and onion powder.

  7. Gradually add the stock, one tablespoon or so at a time, mixing until smooth after each addition. Stir in 1/2 cup of parmesan cheese. Taste and add salt if necessary. Taste after salting and adjust seasoning if needed.

  8. Spread the cream cheese mixture over the beans and mushrooms in the baking dish. Sprinkle the remaining parmesan over top. Bake in the preheated oven until bubbly in the center and cheese is melted--about 35 minutes.

  9. If cheese topping is not browned to your liking, place under the broiler for 1-2 minutes to brown. Allow to cool 5-10 minutes before serving.

Recipe Notes

Serving size: 1/9th of the casserole

Per serving:

Calories: 321

Fat (g): 23

Carbs (g): 7

Fiber (g): 2

Protein (g): 20

Net carbs (g): 5

  1. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (8)

    Jackie on July 29, 2018 at 8:09 pm

    Made this for the first time tonight. We loved it! A good side dish for our keto diet!

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (9)

      Harper and Annissa Slusher on July 29, 2018 at 10:46 pm

      Yay! Glad it was a hit!
      -Annissa

      Reply

  2. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (10)

    penelope mackenzie on November 2, 2018 at 4:28 pm

    1/9th of the recipe is a serving??????

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (11)

      Annissa on November 2, 2018 at 5:55 pm

      I usually make it in a square pan, so I cut two cuts one way to divide it into thirds, the cut two cuts the other way to divide it into nine portions.

      -Annissa

      Reply

  3. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (12)

    Minnie on November 4, 2018 at 7:53 pm

    Made this tonight and added chicken breasts to make it a meal my family loved it and asked if we could have it a couple times a month

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (13)

      Annissa on November 5, 2018 at 1:18 pm

      I love the idea of adding chicken breasts to make this a meal!

      Reply

  4. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (14)

    Jessie on November 17, 2018 at 1:31 pm

    Do you think you could make this the night before? Thinking about making it for Thanksgiving!

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (15)

      Annissa on November 17, 2018 at 1:57 pm

      I haven’t tried this, but I think it would be okay. I would assemble it the day before, then bake it the day of. Let me know how it goes!
      -Annissa

      Reply

      • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (16)

        Lisa on March 17, 2019 at 5:34 pm

        I have done this with regular green beak casserole…have everything measure and mixed together except the topping (don’t want the onions to get soggy, but that doesn’t apply with this recipe) when traveling several states for Thanksgiving….I’ve got to think you are right, just mix it all up, cover and take out and cook the next day, should work awesome.

        Reply

  5. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (17)

    Becky on January 5, 2019 at 1:10 pm

    I made this tonight and it all curled.

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (18)

      Annissa on January 5, 2019 at 4:41 pm

      Becky,
      I suspect this happened because you added the liquid to the cream cheese too quickly. You need to add it very slowly and beat it between each addition.
      -Annissa

      Reply

  6. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (19)

    Karla on February 19, 2019 at 5:09 pm

    Fried up my own Videlia onions for the top
    Was really really good… I actually prefer this to the higher carb can of soup one Thanks!

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (20)

      Annissa on February 19, 2019 at 7:54 pm

      Sounds awesome! I think I prefer it to the traditional version as well.
      -Annissa

      Reply

  7. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (21)

    Lisa on March 17, 2019 at 5:43 pm

    I will make this but will likely still add the onions on top….the family just won’t like it without. But I have taken numerous recipes that require canned soup, and found “from scratch” recipe verisions (skillet Tuna Noodle Casserole is one) because I’m trying to get away from preservatives, I think they are part of the health issues (i.e. obesity) and allergies our society has developed wide-spread (check it out…cultures that don’t have the convenience factor of pre-packaged food have much fewer food allergies and other health issues…the Japanese seem to live forever AND are for the most part slim people), AND one of the regular meals Mom made growing up was ground beef with onions and Campbell’s condensed cream of mushroom soup on it, we ate it ALL THE TIME she would make a big pan at the beginning of the week, and then we’d eat it until it was done), and I now HATE Campbell’s cream of mushroom.

    However I tried the variation on green bean casserole with cream of chicken soup, and it just was not the same. So this recipe is a welcome addition…think I will try it tonight with chicken breasts, maybe seared in the frying pan first, then put right in the pan with the beans. Sounds yummy!!

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (22)

      Annissa on March 18, 2019 at 4:02 pm

      Let us know how it goes!
      -Annissa

      Reply

  8. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (23)

    Jruz on November 28, 2019 at 3:05 pm

    Just made this for Thanksgiving. It was awesome. I woukd definitely try with chicken on other occasions to make a meal, that’s how good it was.

    Reply

  9. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (24)

    Szymon on December 1, 2019 at 11:17 am

    Recipe is fantastic:)
    We just made it today
    One thing is a bit peculiar – the macro count.
    cup of parmesane and 8oz of cream cheese ads up to 1200 kcal ( give or take)
    And according to info label (1/9) one serving holds 320kcal ( so whole thing has to have 2880 kcal.
    So where the 1680 kcal is coming from?
    Mushrooms or beans?:;);)

    BR
    Szymon

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (25)

      Annissa Slusher on December 3, 2019 at 6:57 pm

      Szymon,
      Glad you enjoyed the recipe!

      Every once in a while I make a mistake or the program I use makes a mistake. While I do this as a service and try to be accurate, I always like to recommend that people calculate their own macros if they are super important to them. I’ll put recalculating macros for this recipe on my list of things to do.

      -Annissa

      Reply

  10. Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (26)

    Nome on December 24, 2020 at 4:13 pm

    I just have to tell you that we have been making your recipe for two or three years now and not just for a holiday. This year we had our non keto friends come for thanksgiving and one of them is so super picky on foods. He gobbled it up. His wife, one of my besties said it was the best green bean casserole she ever had and why didn’t it taste like the normal thing. So I told her I make a special keto one. She said I had to share the recipe so I did. I have given this out to my keto group I have on fb and so on. It has been a dietary godsend. And by the way, I hate green beans but I love this. We use canned for it and it still works great, I have used fresh once and frozen once but don’t tend to have them on hand or have time much. Thank you for such a great keto recipe!

    Reply

    • Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (27)

      Annissa Slusher on December 24, 2020 at 4:33 pm

      I’m so glad the casserole is a hit! What wonderful news to receive on Christmas eve.
      -Annissa

      Reply

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Low-Carb Green Bean & Mushroom Casserole Recipe - Simply So Healthy (2024)

FAQs

Does green bean casserole have a lot of carbs? ›

Green bean casserole, with cream of mushroom soup (0.5 cup) contains 8.5g total carbs, 6.4g net carbs, 6.6g fat, 1.8g protein, and 96 calories.

Can you eat green beans on low-carb diet? ›

Regardless of which type of green bean you choose, they're all low in carbs and calories and high in vitamins, minerals, and antioxidants. Green beans are technically members of the bean and legume food group, but their edible pods make them lighter in carbs and calories.

Which beans are lowest in carbs? ›

Highest and Lowest Carb Beans

Among these, black soybeans and green beans have the lowest carbs, potentially making them better for a keto diet. On the other hand, chickpeas, pinto beans, and navy beans have high carbs. You might want to avoid these if you're strictly following a keto diet.

What foodborne illness can you get from green bean casserole? ›

Green bean casserole

These are all potential signs of Clostridium botulinum, a bacterium that produces the dangerous botulism toxin. While relatively rare, this neurotoxin is among the most dangerous in the world and can be deadly.

How many carbs are in homemade green bean casserole? ›

A 1-cup serving of green bean casserole contains 360 calories, 26 grams (g) fat, 10 g saturated fat, 26 g carbohydrates, 2 g fiber, and a whopping 960 mg of sodium, according to data from the U.S. Department of Agriculture (USDA).

How do you calculate carbs in a casserole? ›

Calculating the carbohydrate content of any recipe involves three simple steps.
  1. Looking up and calculating the carbohydrate value of each ingredient in the recipe,
  2. adding them together,
  3. dividing the total number of carbohydrates in the recipe by the number of servings.

What vegetables are high in carbs to avoid? ›

However, corn and root vegetables like potatoes, yams, and beets have a high starch content and are best avoided. Choose non-starchy vegetables like broccoli, squash, bell peppers, and asparagus to get your fill of fiber and other nutrients while still moderating your intake of carbs.

Should you avoid beans on a low carb diet? ›

Here's Why Beans Are Actually One of the Smartest Foods You Can Eat on a Low-Carb Diet. Beans are an excellent source of plant-based protein, but if you've assumed you can't have them on a low-carb diet, think again.

Which beans are carb blockers? ›

White Kidney Bean Extract is most often used forFat LossandGut Health. Get Examine+ to unlock these insights and the details of over 50,000 other studies. White Kidney Bean extract (also known by the brand Phase 2) is a carbohydrate blocker that works by inhibiting the digestion of starches.

What rice has no carbs? ›

It's Skinny rice is also known as shirataki rice. Like It's Skinny pasta, It's Skinny rice has ZERO carbs in a 1 cup serving and only 9 calories in the entire two-serving bag! That's right!

What pasta has the lowest carbs? ›

What type of pasta is lowest in carbs? "Vegetable-based pastas, such as zucchini noodles or hearts of palm noodles, tend to be lowest in carbs and calories," says Sassos. "They are also packed with nutrient-dense vitamins and minerals and are naturally gluten-free.

Why do people eat green bean casserole? ›

Green bean casserole was considered a perfect dish for holiday entertaining because it was simple, inexpensive, and could easily be made ahead of time. It became known as a "jiffy casserole" because it went from one bowl to one pan.

How many days can you eat green bean casserole? ›

Green Bean Casserole Leftovers

Your creamy green bean casserole will last about four days in the fridge. The crunchy topping will get softer as time goes by; pop it into the oven to reheat to crisp it up a bit. While casseroles have a reputation for being freezer-friendly, green bean casseroles don't freeze so well.

Is it safe to eat green bean casserole left out overnight? ›

According to the USDA, food that has been left out of the fridge for more than two hours should be thrown away. That's because between 40° F and 140° F (what the USDA calls the "Danger Zone"), bacteria grows incredibly fast and can make you sick.

Are canned green beans high in carbs? ›

Green beans (string beans), canned, drained (0.5 cup) contains 2.8g total carbs, 1.5g net carbs, 0.3g fat, 0.7g protein, and 14 calories.

How many carbs are in 2 cups of canned green beans? ›

Canned Green Beans (1 cup, solids) contains 6.8g total carbs, 3.2g net carbs, 0.2g fat, 1.8g protein, and 35 calories.

How many carbs are in a green bean casserole with cheese? ›

Green bean casserole, with cheese, with cream of mushroom soup (0.5 cup) contains 10.8g total carbs, 8.5g net carbs, 13.1g fat, 7g protein, and 184 calories.

Is green bean keto friendly? ›

Green beans and black soybeans are keto-friendly bean options, each containing only 2 grams of net carbs per 1/2-cup (60–90-gram) serving. Some promising keto substitutes for beans include mushrooms, eggplant, avocado, ground meat, and boiled peanuts.

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