Roasted Green Bean and Mushroom Casserole (Vegan)

Kyra Williams for The Upside Blog


The simple act of switching out milk products with a few vegan staples in this traditional holiday dish will make everyone feel welcome (and well-fed) at your table. A thick oat milk and vegan butter for the cream sauce are the only swaps. This recipe calls for pan roasting the slender French green beans first, with hen-of-the-woods mushrooms, shallots and garlic. Roasted green beans bring a sophisticated, intensified savoriness to the casserole’s end result. Delight every holiday guest with this completely plant-based, completely delicious classic vegetable dish!

Vegan Green Bean Casserole Recipe in Baking Dish on Counter

Vegan Green Bean Casserole Recipe in Baking Dish on Counter
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Roasted Green Bean and Mushroom Casserole (Vegan)

Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 12
Calories 193 kcal
Author Kyra Williams




  1. Heat oven to 400 degrees F. Coat 9x13-inch baking dish with olive oil spray.
  2. On sheet pan, toss together green beans, mushrooms, shallots, garlic, olive oil, salt and pepper and spread out evenly on pan.
  3. Roast 15 minutes, toss and roast for another 15 minutes. (Note: This will soften beans.)
  4. In medium-sized sauce pan, melt vegan butter and add flour. Cook for 1-2 minutes, whisking constantly until it comes together. Add milk/cream and whisk until sauce begins to thicken, about 5-6 minutes.
  5. Add onion powder, garlic powder, bouillon cube, salt, pepper and cayenne, if using. Whisk to combine.
  6. In baking dish, combine vegetables and sauce, mixing to coat vegetables. Spread fried onions on top.
  7. Set broiler on high and broil 1-2 minutes until onions become golden and crispy.

Recipe Notes

Get the ingredients you need to make this healthier classic!

Nutrition Facts
Roasted Green Bean and Mushroom Casserole (Vegan)
Amount Per Serving
Calories 193 Calories from Fat 90
% Daily Value*
Fat 10g15%
Saturated Fat 3g15%
Trans Fat 0.01g
Polyunsaturated Fat 1g
Monounsaturated Fat 2g
Sodium 333mg14%
Potassium 426mg12%
Carbohydrates 24g8%
Fiber 5g20%
Sugar 10g11%
Protein 5g10%
Vitamin A 972IU19%
Vitamin C 12mg15%
Calcium 158mg16%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.