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

    • 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

Can I eat canned green beans on a low carb diet? ›

Green beans are a low-calorie, nutritious vegetable that can be a part of your healthy diet. However, if you're on a low-carb diet, you may wonder if you can still enjoy green beans as part of your diet. The good news is green beans are also low-carb, so they can be incorporated into a keto-friendly diet.

How many carbs are in homemade green bean casserole? ›

Green bean casserole nutrition facts and analysis per 1 cup (230 g)
Carbohydrates
NutrientAmountDV
Carbohydrate15.64 g6 %
Fiber4.14 g15 %
Sugars5.87 g
1 more row

Are frozen or canned green beans better for casserole? ›

When I make green bean casserole, I skip canned beans all together. Frozen green beans are the best green beans to use for green bean casserole.

How do you keep green bean casserole from getting mushy? ›

Don't overcook the green beans: Remember when you are blanching the green beans that they will continue to cook and soften while baking in the oven with the rest of the casserole. So it's important to undercook them slightly during this first step so that they don't get mushy in the oven.

What canned vegetables are lowest in carbs? ›

Green beans, olives, sauerkraut, pickles, and tomatoes are all good low-carb canned vegetable choices. Carrots are slightly higher in carbs, but can also be a good choice. You can also find canned coconut flesh and canned broccoli and cauliflower at many international grocery stores.

Why can't you eat green beans on a keto diet? ›

Beans are generally considered a healthy food. They're rich in protein and fiber and provide a variety of vitamins and minerals. However, they also contain some carbs, so it can be a challenge to work them into a low carb, high fat keto diet.

How do you calculate carbs in a casserole? ›

Looking up and calculating the carbohydrate value of each ingredient in the recipe, adding them together, dividing the total number of carbohydrates in the recipe by the number of servings.

Why is green bean casserole so good? ›

Fans love the dish in part because of how simple it is to throw together. It calls for ingredients that could be found in a typical home kitchen pantry: canned or fresh green beans, mushroom soup, milk, soy sauce and black pepper.

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.

Are frozen green beans healthier than canned green beans? ›

Frozen vs. Canned: In general, frozen vegetables are better than canned. Fresh vegetables are blanched before freezing, and they do lose some nutrients but not a lot. Produce frozen right at its peak has more nutrients than produce that is picked too early, held, and shipped for thousands of miles.

Which is better frozen or canned green beans? ›

Green Beans: Depends

Sure, frozen green beans may be higher in nutrients than canned, but we feel the optimal choice depends on how you're going to utilize them. If you're serving them solo, frozen green beans are the way to go. If they're being added to a cooked dish or casserole, canned green beans are just as handy.

Which is healthier frozen or canned vegetables? ›

Aside from certain fruits like tomatoes and pumpkins, canned goods are likely to have less nutritional value than frozen. If you take the canned vegetable route, make sure that you avoid varieties with added sugars or sodium. Also, many of the nutrients from canned vegetables stay in the the liquid.

Should green bean casserole be soupy before cooking? ›

Green bean casserole should have a nice thick sauce that coats the green beans—it should not resemble soup. One common cause of a watery casserole is not adding enough thickener, such as flour or cornstarch, to your sauce.

Can you overcook green bean casserole? ›

The Green Beans Are Mushy

Oftentimes, mushy green beans come down to one of two issues. The first is simply that you overcooked them, and they lost their shape and texture.

How do I thicken up my green bean casserole? ›

Start making a slurry, a tool for thickening sauces, by whisking a small amount of cornstarch or flour with water or broth. Whisk until there aren't visible lumps. It should be thick but drizzly in consistency. As you constantly stir, add small amounts of the slurry to the filling.

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.

Does rinsing canned beans reduce carbs? ›

A second tip is to drain and rinse canned beans. Not only does this reduce the salt, it also removes some of the carbohydrates from the bean liquid that are likely to cause gas.

Do canned green beans have a lot of carbs? ›

Nutrition Information per Serving: Calories 80, Total Fat 2.5 g (4% DV), Saturated Fat 1 g (4% DV), Cholesterol 20 mg (6% DV), Sodium 180 mg (8% DV), Total Carbohydrate 7 g (2% DV), Dietary Fiber 1 g (6% DV), Sugars 2 g, Protein 9 g, Vitamin A 30%, Vitamin C 8%, Calcium 2%, Iron 4%.

Are there any beans you can eat on a low carb diet? ›

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.

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