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Vegan Green Bean Casserole

Vegan Green Bean Casserole features fresh green beans, a creamy mushroom sauce, topped with plenty of crispy fried onions. A classic holiday dish! It's easy to make and can be prepared ahead of time.
Prep Time 20 mins
Cook Time 25 mins
cashew soaking time 1 hr
Course casserole, Side Dish
Cuisine American
Servings 10 servings
Calories 130 kcal


  • 2 pounds green beans fresh is best but frozen works
  • 2 tablespoons olive oil
  • 12 ounces mushrooms sliced
  • 6 cloves garlic minced
  • 1 cup vegetable broth
  • 1/4 cup flour
  • 1/2 cup cashews soaked for at least one hour and drained, then pureed in a blender
  • 1 1/2 cups oat milk or other plant-based milk, unsweetened
  • 1/2 teaspoon salt or to taste
  • 12 ounces french fried onions vegan


  • Prepare the beans: Trim the ends, if using fresh beans. Bring a large pot of water to a boil, then add the beans and cook for 5 minutes. Drain and set aside.
  • Puree the cashews and oat milk in your food processor or blender.
  • Preheat the oven to 400 degrees F. If you don't have a 10 inch cast iron skillet, lightly grease a large casserole dish and set aside.
  • Warm the oil in a large cast iron skillet (10 inches) over medium-high heat. Add the mushrooms and garlic and cook for 3-5 minutes until the mushrooms are soft.
  • Sprinkle the flour on top of the mushrooms, then slowly add the vegetable broth and stir until the mixture thickens. Add the cashew and oat milk mixture, stirring frequently for about 5 minutes until thick and creamy. Add salt to taste. Remove from heat.
  • To the skillet, add the green beans and 1/3 cup of the french fried onions. (If you don't have a cast iron skillet, add all ingredients to the casserole dish instead.)
  • Top with the rest of the french fried onions, place the cast iron skillet (or casserole dish) in the oven and cook for 15-20 minutes, until the onions are crispy but not burnt. Serve immediately.


Prepare green bean casserole ahead of time: Follow the recipe as written, except do not preheat the oven. Once the green beans, mushroom mixture and 1/3 cup french fried onions are mixed and added to a casserole dish, simply cover with foil or wrap and place in the refrigerator until ready to cook. This can be done a day in advance. When ready to serve, remove foil or wrap and bake for 30 minutes (until warm in the middle). Top with french fried onions and cook for 5 more minutes and serve.


Calories: 130kcalCarbohydrates: 16gProtein: 5gFat: 6gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gSodium: 236mgPotassium: 371mgFiber: 3gSugar: 7gVitamin A: 750IUVitamin C: 12mgCalcium: 93mgIron: 2mg
Keyword casserole
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