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Keto Green Bean Casserole – Low Carb Recipe

This keto green bean casserole recipe is based on the Thanksgiving classic made with cream of mushroom soup, French's onion straws and of course, green beans. There are other Thanksgiving green bean recipes, but this is the one that many expect to be on the table.

According to Campbell's website, the original recipe was written by the Campbell test kitchen manager Dorcas Reilly in 1955. This green bean recipe has since become a staple at Thanksgiving. While I was never a fan, my husband absolutely expects this to be on our Thanksgiving menu.

French's original crispy fried onions are used in the original recipe. A small amount of these could be used and still fit within keto macros. However, they still have wheat which is full of gluten and dextrose, which is just another name for sugar. You can download our handy reference list of over 60 names for sugar here.

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Keto Green Bean Recipe

The other main ingredient in this dish, canned cream of mushroom soup, also has some issues with being keto friendly. Read more about why most cream of mushroom soup doesn't work for keto in our Keto Cream of Mushroom Soup recipe. For this keto green bean recipe, you'll need to make some changes from the original. Fortunately it's easy enough to make substitutions for the original carby ingredients with healthier, homemade, keto-friendly options.

faq

Are Green Beans Keto?

If you're wondering if green beans are keto, the short answer is yes. Green beans have very keto-friendly macros and are low calorie too. This makes green beans great for dieting.

A cup of green beans has just 28 calories, 5.5 grams of carbs and 2.5 grams of fiber, which means there are just 3 net carbs in the whole cup.

Look for a green bean recipe that doesn't use other carb filled ingredients to ensure your dish stays keto.

Keto Green Bean Casserole

Prep Time: 10 minutes
Total Time: 45 minutes
Servings: 8 people

Ingredients  

Onion Topping

  • 1 large egg, beaten
  • ½ teaspoon salt
  • 1 medium onions, thinly sliced
  • 2 teaspoons cream of tartar
  • 4 tablespoons pork rind panko, or finely crushed pork rinds
  • 4 tablespoon parmesan cheese, finely grated
  • spray coconut oil, or lightly coat

Beans and Sauce

Instructions

  • Preheat oven or air fryer to 475°F.
  • In a medium bowl, beat the egg and salt together until smooth.
  • Place the onions in the egg mixture and stir gently to coat the onions and separate into rings.
  • In a separate medium bowl, mix together the cream of tartar, pork rind panko and parmesan cheese.
  • Using a fork, remove onions from egg mixture, letting excess drip off before placing the onions into the panko mixture. Repeat until all onions are added and toss gently to coat.
  • Spray or lightly coat a baking sheet with coconut oil.
  • Shake excess coating from onions and place in a single layer on the baking sheet.
  • Cook until lightly browned and tender, about 30 minutes, tossing the onions once about halfway through.
  • Remove onions from the oven and set aside to cool.
  • Reduce oven heat to 400°F.
  • Prepare the green beans while the onions are cooking. Bring a large stockpot of water to a boil
  • While the onions are cooking, prepare the beans. Bring a gallon of water and 2 tablespoons of salt to a boil in an 8-quart saucepan. Add the beans and blanch for 5 minutes. Drain in a colander and immediately plunge the beans into a large bowl of ice water to stop the cooking. Drain and set aside.
  • Lightly coat a 1 to 1 1/2 quart casserole dish with coconut oil or butter.
  • In a large bowl, mix together the green beans, cream of mushroom soup and a quarter of the crispy onions. Place the mixture into the casserole dish and top with the rest of the onions.
  • Place the beans into the oven and bake until bubbly, about 15 minutes.
  • Serve while hot.

Notes

Carbs in this recipe are from the green beans and onions. If you'd like to reduce carbs even more, consider a smaller serving of green beans. However, I find carbs from low carb, whole food vegetables don't generally affect ketosis.

Nutrition

Serving: 1servingCalories: 119kcalCarbohydrates: 7gProtein: 7gFat: 4gSaturated Fat: 1gPolyunsaturated Fat: 0.2gMonounsaturated Fat: 0.4gTrans Fat: 0.003gCholesterol: 32mgSodium: 2079mgPotassium: 275mgFiber: 2gSugar: 2gCalcium: 61mgIron: 1mgNet Carbohydrates: 5g

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Author

  • Cheryl McColgan

    Cheryl McColgan is the Founder and Editor in Chief of Heal Nourish Grow, where she has published evidence-based health and nutrition content since 2018.

    With over 30 years of experience in fitness, nutrition, and healthy living, and nearly 20 years of professional editorial and journalism experience, she brings both subject-matter depth and trained editorial judgment to everything on the site.

    Cheryl holds a degree in Psychology with a minor in Addictions Studies, completed graduate training in Clinical Psychology, and is a NASM Certified Personal Trainer and E-RYT Certified Yoga Instructor and trained in Yoga Therapy.

    She is the author of 21 Day Fat Loss Kickstart, Make Keto Easy, Take Diet Breaks and Still Lose Weight, The Grain Free Cookbook for Beginners, and Easy Weeknight Keto.

    Read more about Cheryl and the journey that created Heal Nourish Grow on the about page.

    Cheryl McColgan is the founder of Heal Nourish Grow, where she writes about protein, body composition, healthy aging, and evidence-based nutrition and wellness along with the everyday habits that actually make those things work in real life.

    With a background in psychology and graduate training in clinical psychology, plus nearly 20 years of experience in editorial and publishing, Cheryl approaches health from both a research and real-world perspective. She’s also been immersed in fitness and nutrition for more than 25 years, which gives her a practical lens most purely academic content tends to miss.

    Her work today focuses heavily on protein intake (especially for women), muscle retention, metabolic health, and sustainable fat loss, along with topics like sleep, wellness, recovery, and wearable health tech. You’ll also find a mix of high-protein, low-carb recipes designed to make hitting those goals easier without overcomplicating things.

    Cheryl’s interest in health and nutrition became more personal after navigating her own health challenges, which pushed her to dig deeper into how lifestyle, diet and daily habits impact long-term health. That experience continues to shape how she approaches everything on this site: practical, realistic, and focused on what actually works over time.

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