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Dairy-free green bean casserole in a white casserole dish.

The Best Dairy-Free Green Bean Casserole

Kayla
This Dairy-Free Green Bean Casserole tastes like a classic green bean casserole. It's even made with homemade fried onions, which will leave your guests raving about it!
5 from 2 votes
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Course Side Dish
Cuisine American
Servings 8
Calories 210 kcal

Equipment

  • Air-Fryer
  • High speed blender
  • Food processor
  • Mandolin slicer or chefs knife

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. Then, let them cool down before blending.
    1 cup cashews
    2 cups chicken broth

Preparing the Fried Onions

  • While the cashews are boiling, prepare the onions. Slice off the end opposite to the root end, and peel off the skins. 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. 
    2 yellow onions
  • Mix the almond milk and apple cider vinegar, then let sit for a minute. Stir before tossing the onions in.
    1 cup unsweetened almond milk
    1 tablespoon apple cider vinegar
  • Mix the flour and spices.
    1 cup whole wheat flour
    ½ teaspoon paprika
    1 teaspoon garlic powder
    1 teaspoon salt
    pinch of white pepper
  • Toss the onions in the milk mixture, then coat well with the flour. 
  • Spray the basket or tray of your air fryer, then add some of the onions in a single layer (do not overcrowd). Spray 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 batches 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.
  • Next, wash the fresh green beans, then slice them in half, and steam them until tender. 
    24 ounces green beans

The Creamy Mushroom Mixture

  • Wash the mushrooms, then chop them in a food processor into fine pieces. Toss them on a skillet with some oil and let cook for about 5 minutes, until soft. If water is released from the mushrooms, drain it.
    1 tablespoon olive oil
    8 ounces of mushrooms
  • In a high-speed blender, add the cashews, broth, spices, and lemon juice. Blend until smooth. Then toss in the cooked mushrooms and lightly process to mix.
    2 tablespoons fresh lemon juice
    1 teaspoon onion powder
    ½ teaspoon garlic powder
    ½ teaspoon coarse kosher salt
    ¼ teaspoon white pepper
  • If the mixture is thin, transfer it to a small pot 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 like a gravy/condensed soup consistency.
  • Place the green beans in the bottom of a casserole dish, pour over the creamy mushroom mixture, and mix well. The mixture should be warm.
  • Add the warm, crispy onions on top, and enjoy!

Notes

  • Coarse kosher salt does not measure the same as fine table salt. If you aren't using a coarse salt, use less and add to taste.
  • If you want less crispy onions, use 1 medium yellow onion. If you end up with extra, just serve it on the side so guests can add more as desired. 
  • You can substitute fresh green beans for canned green beans.
  • If you need this to be gluten-free, use gluten-free all-purpose flour. I like to use Bob's Red Mill 1:1 Baking Flour.

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 green bean casserole
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