This post may contain affiliate links, which help keep this content free. (Full disclosure)
The official first day of fall is less than a week away! It always seems strange to me that the changing of the seasons always happens in the middle of the month. Why not the first? Either way, autumn means cooler weather is coming, and that means the start of casserole season! To be honest, I make them year round, but I’m heading into fall with a low carb gluten-free green bean casserole recipe.
Nothing beats a comforting casserole as the weather cools down! Well, except maybe my all-time favorite cold weather staple – easy broccoli cheese soup. This week is still warm, but after that the forecast says it will feel more like autumn. It was already a little gloomy and rainy this morning. I’m getting ready!
Other than soup, casseroles are one of the main staples at our house in the cooler months. There are the all-in-one dinners, like chicken bacon ranch casserole or low carb chicken cordon bleu casserole. I absolutely love those for their convenience. Plus, they leave everyone happy, freeze well, and make great leftovers for lunch. And of course, there are side dishes like brussels sprouts casserole au gratin and low carb sweet potato casserole, which are especially popular around the holidays and perfect to pair with low carb garlic butter herb roasted turkey.
Low carb gluten-free green bean casserole is another veggie dish you’ll want to make! You only need a few simple ingredients…
With a Russian family, we didn’t grow up eating typical American fare like green bean casserole (let alone keto low carb green bean casserole!). I did try it at American friends’ houses, though. Later, working at restaurants in my high school and college days, it was frequent fare at buffets for various holidays throughout the year. The servers got to eat the leftovers sometimes.
Needless to say, all those versions were definitely not low carb. Sadly, I have yet to see a gluten-free green bean casserole at a restaurant.
Fortunately, it’s actually really easy to make your own low carb gluten-free green bean casserole! The main sources of carbs and gluten are the sauce and the topping.
Let’s talk about the topping first. Of the versions I’ve tried, the topping is usually some kind of breadcrumbs, or breaded onion strings. You can make a low carb version by combining almond flour, dried minced onions, and avocado oil. Any other oil or butter will work fine, as well.
For the creamy sauce, even gluten-free green bean casserole recipes often use canned cream of mushroom soup. Although you can find store bought brands that are gluten-free, they are usually filled with starch and preservatives. Don’t worry, it’s so easy to make your own!
I posted a simple gluten-free cream of mushroom soup recipe last year, and that’s what I used in my low carb green bean casserole recipe. You can make the soup in advance to save time. And, if you happen to have a different cream of mushroom soup recipe you like, feel free to use that instead.
Can you believe Thanksgiving is just two months away? I’m sure that’s when most people will be more interested in a gluten-free green bean casserole – or low carb green bean casserole, depending on your needs. (Mine is both!) So, why am I posting this recipe so early? Don’t laugh, I have my reasons!
First of all, did you know that November is actually not at all peak season for green beans? Of course they are available year round, but they are actually at their peak from June to September! (Who knew?)
Since green bean season is technically right now, I used that as an excuse to make low carb green bean casserole way early this year. I’ll still be making it later this fall, but it’s nice to incorporate seasonal produce at its peak, too. And – bonus for you! – that means you already have your gluten-free green bean casserole recipe all set for the holidays in a couple of months.
More Low Carb Recipes To Love
RECIPE CARD
Low Carb Gluten Free Green Bean Casserole Recipe (Quick & Easy)
RECIPE VIDEO
Click or tap on the image below to play the video. It's the easiest way to learn how to make this recipe!
PrintIngredients
Click underlined ingredients to buy them!
Please ensure Safari reader mode is OFF to view ingredients.
Casserole
- 1 tbsp Avocado oil (or any oil of choice)
- 1 large Onion (chopped)
- 10 oz Mushrooms (sliced)
- 2 lb Green beans (cut in half, making shorter pieces)
- 3 cup Homemade cream of mushroom soup (click link for recipe)
Topping
- 1/2 cup Blanched almond flour
- 2 tbsp Dried minced onion
- 1 tbsp Avocado oil (or any oil of choice)
Instructions
RECIPE TIPS + VIDEO in the post above, nutrition info + recipe notes below!
Preheat the oven to 375 degrees F (191 degrees C).
- Saute the mushrooms & onions: In a skillet over medium heat, saute the onions and mushrooms in avocado oil for about 7-10 minutes, until lightly browned. Remove from heat.
- Cook the green beans: Cook the green beans either in the microwave or on the stove until they are crisp-tender. For the microwave, place the green beans in a large bowl with 1/2 cup water (118 mL) and nuke, stirring at 2 minute intervals, until done (about 6-8 minutes total). For the stove, boil the green beans covered in water for 3-5 minutes.
- Assemble the casserole: Place the cooked green beans, mushroom/onion mixture, and cream of mushroom soup into a glass or ceramic 3-quart casserole dish. Stir together until well combined.
- Make the topping: In a small bowl, stir together the almond flour, and dried minced onions. Stir in the avocado oil until crumbly. Crumble the topping over the casserole.
- Bake: Bake for 18-20 minutes, until the topping is golden.
You'll Also Like These Keto Low Carb Recipes
Recipe Notes
Serving size: 1/2 cup
Video Showing How To Make Low Carb Gluten-Free Green Bean Casserole Recipe (Quick & Easy):
Don't miss the VIDEO above - it's the easiest way to learn how to make Low Carb Gluten-Free Green Bean Casserole Recipe (Quick & Easy)!
NUTRITION INFORMATION PER SERVING
Where does nutrition info come from? Nutrition facts are provided as a courtesy, sourced from the USDA Food Database. You can find individual ingredient carb counts we use in the Low Carb & Keto Food List. Carb count excludes sugar alcohols. Net carb count excludes both fiber and sugar alcohols, because these do not affect blood sugar in most people. We try to be accurate, but feel free to make your own calculations.
More Low Carb & Keto Support!
If you want to know more about how to start a low carb diet, want to substitute sweeteners, need a food list, or need support, check these guides:
Low Carb & Keto Diet Plan
Starter Guide 
Sweetener Conversion Calculator 
Keto Low Carb Macro Calculator 
Low Carb Keto Food List + Printable PDF
© Copyright Maya Krampf for Wholesome Yum. We'd LOVE for you to share a link to this recipe, but please DO NOT COPY/PASTE the recipe instructions to social media or websites. You may share a photo with a link back instead.
Did you make this recipe?
Click here to leave a comment + star rating! ★★★★★
Share a recipe pic with #wholesomeyum on Instagram or in our Facebook support group.
Join the Easy Keto Challenge to enter monthly giveaways every time you share your pics of my recipes!
Shop My Favorite Low Carb Must-Haves
Use the buttons below to buy low carb basics! Then, get the full low carb pantry shopping list, browse low carb product discounts, and visit my Amazon Shop!
13 Comments
Liz
I have a son who is allergic to almonds, but he can eat other nuts. What would make a good substitute for the almond flour?
Wholesome Yum
Some crushed pecans would taste great here, Liz!
Stephanie
This is great thanks! Do you think ground beef would go with this?
Maya | Wholesome Yum
Thank you, Stephanie! Sure, you could add some cooked ground beef if you’d like.
Julia LaBorde
Excellent recipe! I’ve made it 2 years in a row for Thanksgiving!
Wanya
This was a hit last Thanksgiving with my family. I added jalapeno peppers for an extra kick!
Maya | Wholesome Yum
Yay, so glad to hear that, Wanya!
Alyson
I’ve been missing a good green bean casserole. Thank you.
Maya | Wholesome Yum
I am so glad you liked it, Alyson! Have a great day!
Elyssa
Have you tried to make the whole casserole in advance? Does it freeze?
Maya | Wholesome Yum
Hi Elyssa, Yes, you can freeze it. The sauce can separate a little so you’ll need to mix it well after heating. For best results, add the crumble topping right before serving, but you can make the rest ahead.
Carolyn Ricketts
I LOVE your website. You are the only way I have succeeded on the low carb diet. Thank you!!
Maya | Wholesome Yum
Thank you, Carolyn! I’m glad I can help!