Healthy Green Bean Casserole

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Healthy green bean casserole made with a creamy mushroom cashew sauce and homemade crispy baked onions on top. Vegan + gluten-free friendly.

Growing up, green bean casserole was at every single holiday meal (at least from what I can remember!). A few years back, someone dropped green bean casserole off the holiday roster and I really missed it! I love when food and memories collide and this casserole does just that.

Traditionally green bean casserole is made from canned cream of mushroom soup and packaged fried onions, but in true EBF fashion, I upgraded the recipe! No more canned veggies and soup… we’re using fresh green beans and mushrooms, homemade crispy baked onions and a homemade cashew cream sauce.

Casserole dish with healthy green bean casserole topped with crispy onions. A wood spoon is beside the baking dish.

There are two main parts to a green bean casserole… the crispy onion topping and the creamy green beans. When I upgrade recipes to make them healthier, I don’t want to miss out on the essence of the dish so yes, this is still a creamy casserole topped with crispy onions.  Trust me, your friends and family won’t even know it’s the “healthy” version.

A plate of healthy green bean casserole topped with crispy onions and a gold fork is on the plate.

Aren’t the bright green beans so pretty and fresh looking? And they taste way better than canned beans, IMO!

Let’s Make Healthy Green Bean Casserole

Start by soaking your cashews in water. Combine the onions, flour, panko and salt in a large mixing bowl and toss to combine. Coat a sheet pan with cooking spray and evenly spread the onions on the pan. Place the pan in the middle rack of the oven and bake until golden brown, tossing every 10 minutes. When they’re done baking, remove them from the oven and set them aside.

As your onions cook, you’ll prep your green bean mixture. The key here is blanching your fresh green beans! To do so, you’ll bring a large pot of water to boil. Add the beans and blanch for 5 minutes. Drain and immediately plunge the beans into a large bowl of ice water to stop the cooking. When the beans have cooled, drain and set aside in a large bowl.

Mushroom Cashew Cream Sauce

Time to make the cream sauce! Drain the cashews and add to a blender with almond milk. Blend until smooth and creamy and set aside. In a large skillet, melt the butter and add the mushrooms, salt and pepper and cook, stirring occasionally. Then add garlic and nutmeg. Sprinkle the flour over the mixture and stir to combine. Add the broth and tamari and bring to a simmer. Decrease the heat and add in the cashew cream. Cook until the mixture thickens, stirring occasionally.

Mixing bowl with green beans, crispy onions, and a vegan, creamy mushroom sauce.

To assemble, pour the cream sauce into the large bowl with the green beans and add 1/2 cup of the baked onions. Place the green bean mixture into the prepared casserole dish and add the onion topping. Place into the oven and bake until bubbly and warm throughout.

Casserole dish with healthy green bean casserole topped with crispy onions. A wood spoon is scooping some of the casserole.

More Holiday Favorites

Healthy Green Bean Casserole

4 from 35 votes
Healthy green bean casserole made with a creamy mushroom cashew sauce and homemade crispy baked onions.
A wooden spoon scooping green bean casserole out of a glass baking dish.
Prep Time 20 minutes
Cook Time 58 minutes
Total Time 1 hour 18 minutes
Servings 6

Ingredients

Crispy Baked Onions

  • 2 medium onions, thinly sliced
  • ¼ cup oat flour
  • 2 tablespoons panko bread crumbs, gluten-free, if needed
  • 1 teaspoon sea salt
  • Nonstick cooking spray

Green Beans and Sauce

  • ½ cup cashews, soaked
  • 1 cup unsweetened almond milk
  • 24 oz fresh green beans, rinsed, trimmed and halved
  • 2 Tablespoons vegan butter
  • 12 ounces baby portobello mushrooms, trimmed and cut into 1/2-inch pieces
  • 1 teaspoon sea salt
  • 1 teaspoon ground pepper
  • 3 cloves garlic, minced
  • ¼ teaspoon ground nutmeg
  • 2 Tablespoons oat flour
  • 1 cup vegetable broth
  • 1 teaspoon low-sodium tamari, or soy sauce

Instructions
 

  • Add 1/2 cup cashews to a bowl with water for soaking. Let soak for at least 30 minutes.
  • Preheat the oven to 475°F.
  • Combine the onions, flour, panko and salt in a large mixing bowl and toss to combine. Coat a sheet pan with nonstick cooking spray and evenly spread the onions on the pan. Place the pan on the middle rack of the oven and bake until golden brown, approximately 25 minutes, tossing every 10 minutes. Once done, remove from the oven and set aside until ready to use. Reduce oven temperature to 375°F.
  • While the onions are cooking, prepare your green bean mixture.
  • Bring a large pot of water to a boil. 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 in large bowl.
  • Drain cashews and add to a blender with almond milk. Blend until smooth and creamy and set aside.
  • Melt the butter in a large skillet over medium-high heat. Add the mushrooms, salt and pepper and cook, stirring occasionally for 4 to 5 minutes. Add the garlic and nutmeg and continue to cook for another 1 to 2 minutes. Sprinkle the flour over the mixture and stir to combine. Cook for 1 minute. Add the broth and tamari, simmer for 1 minute. Decrease the heat to medium-low and add the cashew cream. Cook until the mixture thickens, stirring occasionally, approximately 6 to 8 minutes.
  • Remove from the heat and pour sauce into a large bowl with the green beans and ½ cup of the crispy baked onions. Place green bean mixture into a 8×8 baking dish and top with the remaining crispy baked onions. Place into the oven and bake until bubbly and warm throughout, approximately 15-20 minutes. Remove and serve immediately.

Video

Nutrition

Serving: 1/6 of recipe Calories: 213kcal Carbohydrates: 26g Protein: 9g Fat: 10g Sodium: 690mg Fiber: 6g Sugar: 7g
Course: Lunch/Dinner
Cuisine: American
Keyword: healthy green bean casserole

DID YOU MAKE THIS RECIPE?

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Recipe Rating




    49 comments
    1. Janet Pilkington
      November 30, 2021 AT 1:35 pm

      5 stars
      Being British I have never heard of this dish so I decided to have a go and make it. I was not disappointed not one bit. Absolutely Dlish with a capital D. Will be making again and again.

      1. Brittany Mullins
        December 1, 2021 AT 11:42 am

        Ah yay! This makes me so happy to hear, Janet! Thanks so much for trying this recipe out and coming back to leave a review. I really appreciate it!

    2. Courtney
      November 25, 2021 AT 10:13 pm

      5 stars
      Update- I made the dish the night before and topped it with the onions once we got to our in-laws. This was by far the best dish on the table!! I loved it and the rest of the family did too! Such a yummy dish. I will be making this one again very soon! Thank you!

      1. Brittany Mullins
        November 29, 2021 AT 10:50 am

        Ah yay!! So pumped to hear this green bean casserole was a hit, Courtney!! Thanks so much for the review. It means so much to me!

    3. Velda
      November 24, 2021 AT 11:11 am

      Hi! Can this be made the day before? Any suggestions on how to make it sheas and still have fresh taste?

      1. Brittany Mullins
        November 24, 2021 AT 3:07 pm

        Yes! I’m doing that this year! Going to prep everything and store the green beans casserole and the onions in the fridge overnight (separately) and then I’ll add the onions on top before baking tomorrow!

    4. Courtney
      November 23, 2021 AT 10:17 pm

      Hello! This is the dish I will be bringing to thanksgiving this year. We will be traveling a few hours and I will be prepping it ahead of time. How do you suggest I do the onions so they will stay crispy? Put them in a paper bag or something? Thank you for the great recipe and Happy Thanksgiving!

      1. Brittany Mullins
        November 24, 2021 AT 3:03 pm

        Hi Courtney! I think that’s a great idea. I’m making it for Thanksgiving this year too and I’m going to store the onions separately.

    5. CounselorChick
      November 23, 2021 AT 4:28 pm

      Hey Brittany. Happy thanksgiving! Can this dish be made ahead waiting prep & add the onions prior to baking? TIA!

      1. Brittany Mullins
        November 24, 2021 AT 3:05 pm

        Yes! I’m doing that same thing this year! Going to prep everything and store the green beans casserole and the onions in the fridge overnight but separately and then I’ll add the onions before baking tomorrow!

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