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    Home » Sides

    Published: Nov 14, 2021 · Modified: Jan 3, 2023 by Kayla · This post may contain affiliate links.

    The Best Dairy-Free Green Bean Casserole

    Jump to Recipe Print Recipe

    This Dairy-Free Green Bean Casserole is complex in flavor and has a classic green bean casserole taste. It's made with homemade fried onions, which will leave your guests caught up on the wow factor it brings.

    Overhead shot of dairy-free green bean casserole in a white bowl with a gold fork to it's left, and a white casserole dish filled with green bean casserole behind it.

    These fried onions are even cooked in the air fryer and you would never guess by the looks, taste and texture!

    Jump to:
    • 🔪Equipment
    • 🍞Substitutions
    • 📝Instructions
    • 🧊Storing
    • ⏱Make ahead of time
    • 🍽Other dairy-free Thanksgiving side dishes
    • 📖 Recipe
    • 💬 Comments

    This post contains affiliate links. I may earn commission from qualifying purchases at no additional cost to you. I will never recommend a product I don't use or trust. Thank you for your support.

    🔪Equipment

    I use this food processor for the mushrooms! It's a great mini food processor, but I do have to process them in a couple different batches!

    🍞Substitutions

    Flour: If you want to make this a gluten and dairy-free green bean casserole, you can swap out the wheat flour for a gluten-free all-purpose flour.

    Mushrooms: There isn't really another flavor you could swap the mushrooms for, so if you don't like them, you can make the green bean casserole without mushrooms.

    Chicken broth: If you are vegan or vegetarian, you can swap out the chicken broth for vegetable broth.

    Milk: You can also make this recipe with coconut milk (from the carton, not canned) or even oat milk, as long as it's unsweetened/unflavored and you enjoy the taste of it in your cooking.

    📝Instructions

    In a pot, bring the cashews and chicken broth to a boil, cover and turn down the heat to about medium heat for about 15 minutes.

    Once the cashews are finished cooking, let them cool down just a bit before blending.

    Preparing the Fried Onions

    While the cashews are boiling, grab your onions, peel the skins off and slice off the end of it, not the root end. With a mandolin slicer, slice very thin strips of onion. If you don't have a mandolin, you can use a knife. Just make sure they are very thin rings. If they are too thick they won't be as crispy!

    Mix together the almond milk and apple cider vinegar and let sit for a minute. Stir before throwing the onions in.

    Mix together the whole wheat flour and spices.

    Toss the onions in the milk mixture, then coat well with the flour. Instead of cooking all of the onions at once in the air fryer, I like to separate into three batches, just to make sure the onions get plenty crispy and not overcrowded in the fryer! Spray, or even drizzle, the onions with olive oil and mix it around until they are well coated and no onion pieces remain with dry flour. Air fry at 400 degrees Fahrenheit for about 8 minutes. If you place the second and third batch straight into a HOT air fryer, they may take a little less than 8 minutes. Just check on them that last minute so they don't get too crispy or burn.

    Meanwhile, you can optionally slice your fresh green beans in half or leave them whole and then steam them.

    The Creamy Mushroom Mixture

    Next, process the mushrooms in a food processor until they are chopped into fine pieces. Toss them on a skillet with some oil and let cook for about 5 minutes, until soft and the water starts to come out of them. Cooking them allows the flavors to come out more and makes it take on a new texture. With a spatula, push the mushroom pieces tightly to one side of the pan, and squeeze out the water. Drain the water.

    In a high speed blender, add the cashews, broth, spices and lemon juice and blend until smooth. Then toss in the cooked mushrooms and lightly process just to mix it together.

    If the mixture is still thin, transfer it to a small pot or a deep pan over the stove and bring it to a light boil. Maintain the heat level to a light boil while you constantly stir. This could take around 5 minutes or so. It will thicken up just like a true cream.

    Place the green beans in the bottom of a casserole dish, pour over the creamy mushroom mixture and mix well with some kitchen tongs.

    The mixture should be warm from the cashews and green beans, but if its not you can warm it up in the oven.

    Add the warm, crispy onions on top and enjoy!

    🧊Storing

    Store in the refrigerator in an airtight container for 3-4 days.

    ⏱Make ahead of time

    You can prepare the creamy mushroom mixture and green beans in a casserole dish, cover and refrigerate the night before and then prepare the crispy onions the morning of. Warm up the casserole in the oven at 350 degrees Fahrenheit for about 25-30 minutes and then top with onions! I would wait to put the onions on the casserole until ready to serve just so that they stay crispy and don't get soggy!

    Of course it will still taste delicious either way, but for best results you can add them last.

    🍽Other dairy-free Thanksgiving side dishes

    Dairy and Gluten-Free Pumpkin Pie

    Vegan Creamed Corn

    Dairy-Free Mac and Cheese

    Creamy Dairy-Free Mashed Potatoes

    Healthier Apple Crisp

    Dairy-Free New York Cheesecake

    If you try this Dairy-Free Green Bean Casserole, please leave a review and let me know if you enjoyed it! Also, snap a picture and tag me on Instagram @thedairyfreemenu.

    📖 Recipe

    Overhead shot of dairy-free green bean casserole in a white bowl with a gold fork to it's left, and a white casserole dish filled with green bean casserole behind it.

    The Best Dairy-Free Green Bean Casserole

    Kayla
    This Dairy-Free Green Bean Casserole is complex in flavor and tastes of a classic green bean casserole. It's even made with homemade fried onions, which will leave your guests caught up on the wow factor it brings.
    5 from 2 votes
    Print Recipe Pin Recipe
    Prep Time 10 mins
    Cook Time 30 mins
    Total Time 40 mins
    Course Side Dish
    Cuisine American
    Servings 8
    Calories 210 kcal

    Ingredients
      

    Creamy Mushroom Mixture

    • 1 cup cashews unsalted
    • 2 cups reduced sodium chicken broth or vegetable broth
    • 2 tablespoons fresh lemon juice
    • 8 ounces mushrooms white or baby bella, processed
    • 1 tablespoon olive oil
    • 1 teaspoon onion powder
    • ½ teaspoon garlic powder
    • ½ teaspoon coarse kosher salt or to taste, see notes**
    • ¼ teaspoon white pepper
    • 24 ounces fresh green beans

    Fried Onions

    • 2 medium yellow onions thinly sliced
    • 1 cup unsweetened almond milk
    • 1 tablespoon apple cider vinegar
    • 1 cup whole wheat flour
    • ½ teaspoon paprika
    • 1 teaspoon garlic powder
    • 1 teaspoon coarse kosher salt see notes**
    • pinch of white pepper
    • olive oil for coating the onions in the air fryer

    Instructions
     

    • In a pot, bring the cashews and chicken broth to a boil, cover and turn down the heat to about medium heat for about 15 minutes.
    • Once the cashews are finished cooking, let them cool down just a bit before blending. 

    Preparing the Fried Onions

    • While the cashews are boiling, grab your onions, peel the skins off and slice off the end of it, not the root end. With a mandolin slicer, slice very thin strips of onion. If you don't have a mandolin, you can use a knife. Just make sure they are very thin rings. If they are too thick they won't be nice and crispy!
    • Mix together the almond milk and apple cider vinegar and let sit for a minute. Stir before throwing the onions in.
    • Mix together the whole wheat flour and spices.
    • Toss the onions in the milk mixture, then coat well with the flour. Instead of cooking all of the onions at once in the air fryer, I like to separate into three batches, just to make sure the onions get plenty crispy and not overcrowded in the fryer! Spray, or even drizzle, the onions with olive oil and mix it around until they are well coated and no onion pieces remain with dry flour. Air fry at 400 degrees for about 8 minutes. If you place the second and third batch straight into a HOT air fryer, they may take a little less than 8 minutes. Just check on them that last minute so they don't get too crispy or burn.
    • Meanwhile, steam your green beans. If you prefer bite sized green beans, chop them in half before steaming.

    The Creamy Mushroom Mixture

    • Next, process the mushrooms in a food processor until they are chopped into fine pieces. Toss them on a skillet with some oil and let cook for about 5 minutes, until soft and the water starts to come out of them. Cooking them allows the flavors to come out more and makes it take on a new texture. With a spatula, push the mushroom pieces tightly to one side of the pan, and squeeze out the water. Drain the water.
    • In a high speed blender, add the cashews, broth, spices and lemon juice and blend until smooth. Then toss in the cooked mushrooms and lightly process just to mix it together.
    • If the mixture is still thin, transfer it to a small pot or a deep pan over the stove and bring it to a light boil. Maintain the heat level to a light boil while you constantly stir. This could take around 5 minutes or so. It will thicken up just like a true cream.
    • Place the green beans in the bottom of a casserole dish, pour over the creamy mushroom mixture and mix well with some kitchen tongs.
    • The mixture should be warm from the cashews and green beans, but if its not you can warm it up in the oven.
    • Add the warm, crispy onions on top and enjoy!

    Notes

    Coarse kosher salt does not measure the same as finer table salts. If you aren't using a coarse salt, use less and add to taste.
    If you feel that the fried onions need more salt, just sprinkle some salt over them once they come out of the air fryer.

    Nutrition

    Calories: 210kcalCarbohydrates: 26gProtein: 8gFat: 10gSaturated Fat: 2gPolyunsaturated Fat: 2gMonounsaturated Fat: 5gSodium: 719mgPotassium: 503mgFiber: 5gSugar: 6gVitamin A: 599IUVitamin C: 15mgCalcium: 92mgIron: 3mg
    Keyword dairy free casserole, dairy free thanksgiving, green bean casserole, thanksgiving sides
    Tried this recipe?Let us know how it was!

    **Note: Nutrition label is just an estimate. Amounts may vary.

    Nutrition label does not include oil for spraying the onions.

    210 calories per serving.

    More Sides

    • Marinated Brussel Sprouts
    • Air Fryer Broccoli and Cauliflower
    • Healthier Garlic Bread
    • Vegan Creamed Corn
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    Reader Interactions

    Comments

    1. Kristina says

      November 26, 2022 at 6:57 pm

      5 stars
      This recipe is phenomenal! This was by far the best green bean casserole I’ve ever had!

      Reply
      • Kayla says

        November 27, 2022 at 10:15 am

        Yay! Thank you so much for sharing!!

        Reply
    2. Ashley says

      November 26, 2022 at 11:20 pm

      5 stars
      By far the BEST green bean casserole I have ever had! I’ll be making this dish every year at thanksgiving and a few other times!

      Reply
      • Kayla says

        November 27, 2022 at 10:16 am

        That makes me so happy to hear that! Thank you for sharing!!

        Reply

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    Kayla Daniels.

    HEY THERE! I'M KAYLA.

    I make delicious food that just so happens to be dairy free. It's my goal to help make you excited about what you can eat! So here's a menu of options. Enjoy!

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