Low Carb Green Bean Casserole: A Keto-friendly Twist On A Classic Dish!

Low Carb Green Bean Casserole A Keto-friendly Twist On A Classic Dish!
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Low Carb Green Bean Casserole Recipe
This Keto Green Bean Casserole merges tradition with a keto-friendly touch. Enjoy the classic dish while staying low-carb and gluten-free.

Greetings, fellow foodies! Today on Beyond The Bayou Blog, we’re showcasing a classic dish with a modern twist: Low Carb Green Bean Casserole. I love discovering and sharing recipes that are straightforward yet deliver that warm, homey feeling, and this one certainly fits the bill.

Low Carb Green Bean Casserole is a delicious, keto-friendly version of the classic holiday favorite. This dish combines the rich, comforting flavors you love while keeping it low in carbs and gluten-free. Fresh cremini mushrooms, creamy keto condensed soup, and crunchy fried onions create a mouthwatering blend that pairs perfectly with tender green beans.

Whether you’re adhering to a keto diet or just looking for a healthier side dish, this casserole is a perfect addition to your festive table.

Enjoy the tradition without compromising your dietary goals with this simple and satisfying recipe.

Are Green Beans Low-carb Friendly?

Absolutely! Imagine digging into a keto green bean casserole that’s loaded with rich, cheesy goodness. It’s just like the classic your mom used to make but without the carb-heavy mushroom soup. Did you know a cup of cream of mushroom soup packs in 16 net carbs? That’s a lot! By skipping that soup, you get all the flavor without the extra carbs.

Picture this: you stick your fork into a thick, gooey layer of cheese, pull up a generous bite of saucy, fresh green beans, and take your first mouthful. You’re going to love it, and so will everyone at your dinner table. Plus, fresh green beans themselves have virtually no carbs, making them a great choice for a low-carb diet. Enjoy!

Keto Green Bean Casserole

This dish features a creamy sauce made from heavy cream, cream cheese, and soy sauce, simmered with a bit of dried onion until it’s thick enough to coat a spoon. Fresh green beans are then mixed in and cooked a bit longer. Finally, it’s all placed in an oven-proof dish, topped with cheddar cheese, and broiled until the cheese is golden brown and bubbly.

I tried using frozen green beans, but they turned out too mushy. Fresh mushrooms added too much liquid, whether chopped or sliced. However, a little minced garlic or a sprinkle of garlic powder enhances the flavor nicely. You can also add a drop or two of Worcestershire sauce or even a bit of butter for extra richness.

Don’t forget to check your soy sauce to ensure it’s gluten-free if that’s important to you, as not all soy sauces are. If you’re watching your sodium intake, opt for a low-sodium soy sauce. Enjoy your keto green bean casserole!

Why You’ll Love This Low Carb Green Bean Casserole

  1. Fresh and Flavorful Ingredients: Unlike the traditional version, this casserole uses fresh green beans that stay crisp and vibrant, along with perfectly sautéed mushrooms.
  2. Homemade Keto Cream Sauce: The rich, homemade keto cream sauce delivers an amazing umami flavor that you can’t get from a can. It’s creamy, satisfying, and much healthier.
  3. Cheesy, Crunchy Topping: Instead of the usual fried onions, this casserole features a delicious topping made from crushed Parmesan crisps, adding a wonderful crunch and cheesy goodness.
  4. Healthier Alternative: By avoiding canned soups and using fresh, wholesome ingredients, you skip the preservatives and additives. This makes the dish a healthier option for you and your family.
  5. Easy to Make: Making your own mushroom sauce is nearly as simple as opening a can, but the flavor payoff is huge. It’s a small extra step that makes a big difference.
  6. Low Carb Friendly: Perfect for those following a keto or low-carb diet, this casserole is packed with flavor while keeping the carbs low.
  7. Customizable: You can easily adjust the recipe with different cheeses, herbs, and spices to suit your taste, making it a versatile addition to your meal rotation.

Overview: How To Make Low Carb Green Bean Casserole?

Overview How To Make Low Carb Green Bean Casserole

If you’re looking for a delicious, low-carb twist on a classic holiday dish, this Keto Green Bean Casserole is perfect for you. Combining traditional flavors with a keto-friendly approach, this recipe ensures you can enjoy your favorite comfort food while sticking to your diet. Not only is it low in carbs, but it is also gluten-free, making it a great option for those with dietary restrictions.

To start, preheat your oven to 350 degrees F. Melt two tablespoons of unsalted butter in a deep skillet over medium heat, then add sliced cremini mushrooms. Cook the mushrooms until they are browned and reduced in size by half, which should take about 5 to 7 minutes. While the mushrooms are cooking, warm up your keto condensed cream of mushroom soup in a small saucepan. Gradually stir in half a cup of heavy cream, and adjust the seasoning with pink salt and fresh cracked black pepper to taste.

Next, combine the soup mixture with the mushrooms in the skillet. Pour half of this mixture into the bottom of a 2-quart casserole dish, spreading it out evenly. Layer the drained green beans on top, followed by the remaining soup mixture. Spread the mixture smoothly with a rubber spatula, ensuring the green beans are well coated.

Bake the casserole in the preheated oven for 20 minutes. After that, sprinkle half a cup of keto fried onions on top and continue baking for another 5 to 10 minutes, until the casserole is bubbly and the onions are crispy. Allow the dish to cool for a few minutes before serving, and enjoy a healthier take on a beloved classic. This Keto Green Bean Casserole is sure to be a hit at any holiday gathering or family dinner.

Low Carb Green Bean Casserole A Keto-friendly Twist On A Classic Dish!

Low Carb Green Bean Casserole Recipe

This Keto Green Bean Casserole merges tradition with a keto-friendly touch. Enjoy the classic dish while staying low-carb and gluten-free.
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Course: Side Dish
Cuisine: American
Prep Time: 15 minutes
Cook Time: 20 minutes
Total Time: 30 minutes
Calories: 300kcal
Author: Anne Carter
Servings: 8


  • deep skillet
  • Measuring cups and spoons
  • Wooden Spoon
  • small saucepot
  • 2 quart casserole dish
  • Rubber spatula


  • 2 tbsp unsalted butter
  • 8 ounces cremini mushrooms sliced
  • pink salt
  • fresh cracked black pepper
  • Keto Condensed Cream of Mushroom Soup
  • 1/2 cup heavy cream
  • 2 15- ounce cans of green beans drained
  • 1/2 cup keto fried onions


  • Preheat the oven to 350 degrees F and melt butter in a skillet over medium heat.
  • Add sliced mushrooms to the skillet, cook until browned and reduced by half, about 5-7 minutes.
  • In a small saucepan, heat the condensed soup over medium heat, stir in heavy cream, and adjust seasoning.
  • Combine the soup mixture with the mushrooms, then pour half into a 2-quart baking dish. Top with drained green beans and the remaining soup mixture.
  • Bake for 20 minutes, add fried onions on top, and bake for another 5-10 minutes until bubbly. Let cool before serving.


Calories: 300kcal | Carbohydrates: 6g | Protein: 12g | Fat: 25g | Saturated Fat: 12g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Cholesterol: 54mg | Sodium: 776mg | Potassium: 272mg | Fiber: 2g | Vitamin A: 750IU | Vitamin C: 23.7mg | Calcium: 1210mg | Iron: 1.4mg
Keyword Best Low Carb Green Bean Casserole Recipe, easy Green Bean Casserole Recipe, Green Bean Casserole Recipe, Low Carb Green Bean Casserole Recipe

Tips You Should Try!

  1. Fresh vs. Canned Green Beans: While canned green beans are convenient, using fresh or frozen green beans can elevate the dish. Blanch them briefly before adding to the casserole for a crisp-tender texture.
  2. Mushroom Variety: Don’t limit yourself to just cremini mushrooms. Try mixing in some shiitake or portobello mushrooms for a deeper, richer flavor.
  3. Enhance the Creaminess: If you want an even creamier texture, consider adding a dollop of sour cream or a bit of cream cheese to the soup mixture.
  4. Season Generously: Taste the soup mixture before combining with the mushrooms and green beans. Don’t be afraid to add more pink salt, black pepper, or even a pinch of garlic powder for extra flavor.
  5. Crisp Topping: For a crunchier topping, mix the keto fried onions with some crushed pork rinds or grated Parmesan cheese before sprinkling them on top of the casserole.
  6. Let it Rest: After baking, let the casserole sit for about 10 minutes. This helps it set and makes it easier to serve.

What To Serve With Low Carb Green Bean Casserole?

What To Serve With Low Carb Green Bean Casserole

Variations We Can Definitely Try!

  • Cheese Lover’s Twist: Layer in some shredded cheese between the green beans and on top before baking. Cheddar, Parmesan, or a blend of your favorite cheeses will add extra richness and flavor.
  • Crispy Bacon Addition: Cook some bacon until it’s crispy, crumble it, and sprinkle it over the casserole before serving. The bacon adds a savory crunch and an extra layer of taste.
  • Fresh Herb Infusion: Boost the flavors with fresh herbs. A sprinkle of chopped parsley, thyme, or rosemary mixed into the sauce or on top can elevate the dish’s overall taste.
  • Almond Flour Topping: Replace or complement the cheddar cheese topping with a mixture of almond flour, butter, and a pinch of seasoning. This provides a low-carb, crunchy alternative.
  • Veggie Medley: Add variety and nutrients by mixing in additional low-carb vegetables such as bell peppers, broccoli, or cauliflower.
  • Spice It Up: For a kick of heat, add a dash of cayenne pepper or red pepper flakes to the sauce. This will give your casserole a spicy dimension.

Guide To Store Leftovers!

  • Refrigerator: Keep leftovers covered in the refrigerator for up to 1 week. Use an airtight container or cover the casserole dish tightly with plastic wrap or foil.
  • Preparation: Remove the casserole from the dish and place it in a shallow, freezer-safe container.
  • Wrapping: Cover the container completely with a tight-fitting lid or wrap it well with plastic wrap followed by aluminum foil.
  • Storage: Store in the freezer for up to 6 months.

Can I Make This Ahead Of Time?

You can prepare this casserole up to three days in advance. Simply prepare the casserole as instructed but keep the topping separate and refrigerate them both. When ready to serve, bring the casserole dish to room temperature, add the onion topping and bake for 30 minutes.

Can I Use Fresh Green Beans Instead Of Canned In This Recipe?

Yes, fresh green beans can be used. If using fresh beans, consider blanching or steaming them slightly before assembling the casserole to ensure they are tender during baking. Otherwise, increase the cooking time.

Can I Add Other Vegetables To The Casserole?

Absolutely! Feel free to add other low-carb vegetables such as cauliflower, broccoli, or bell peppers to the casserole for added variety and nutrition.

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