This vegan gluten-free green bean casserole is an easy holiday side, featuring crisp green beans and umami flavor from mushrooms and onions.
If I'm being honest, casseroles are usually not the healthiest foods, so I don't have too many on this blog. But green bean casserole is a Thanksgiving staple, and this version is loaded with veggies for a delicious side dish that is actually good for you!
The dish cooks in just one pan: it starts with a base of mushrooms, onions, and garlic for rich umami flavor. Then you create a simple sauce with vegetable broth, non-dairy milk, nut butter, and spices. Stir in the beans, transfer to a casserole dish, and bake.
An easy holiday side that requires minimal prep!
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Why I Love this Vegan Gluten Free Green Bean Casserole
- Dietary needs - this recipe is dairy-free, plant-based, oil-free, gluten-free, and sugar-free
- Delicious side dish - this casserole is a tasty way to enjoy green beans. Mushrooms add a lovely umami flavor and transform the overall dish
- Really simple - there are only a few ingredients in this casserole, but the result tastes like you spent hours in the kitchen
- Great for the holidays or any Sunday dinner - the great thing about a casserole is that most of the time is hands-off. The casserole cooks in the oven and can be prepped ahead of time
Ingredient Notes & Substitutions
- Cremini Mushrooms: cremini mushrooms add a lovely umami flavor to the casserole to complement the green beans. Creminis (also known as baby bellas) are ideal, but white button mushrooms could work too.
- Shallots: you can also use a small onion.
- Garlic: fresh garlic is ideal. You could also use garlic powder.
- Vegetable Broth: look for a vegetable broth with no added sugar
- Non-Dairy Milk: choose an unsweetened almond milk, soy milk, or oat milk
- Nut Butter: this is optional - a bit of nut butter like cashew butter or almond butter adds some fat to the dish, which helps create a deeper flavor
- Cornstarch: cornstarch helps thicken the sauce. You can also use arrowroot powder.
- Nutritional Yeast: nutritional yeast is a vegan-friendly spice that adds a cheesy flavor. look for it in the baking/spice aisle.
- Salt & Pepper
- Green Beans: if you can, shop for green beans in the bulk section instead of buying a bag. This will allow you to pick out the freshest beans.
Topping
- Breadcrumbs: if you are making this recipe gluten-free be sure to purchase gluten-free breadcrumbs. Double check the ingredients to ensure they are also vegan.
- Nutritional Yeast: a bit of extra cheesy flavor in the topping helps create a nice layer of flavor on top
- Garlic Powder
- Salt
How to make Vegan Gluten Free Green Bean Casserole
Step 1. Preheat the oven to 400°F.
Step 2. In a large skillet, sauté the mushrooms, shallots, and garlic over medium heat until the mushrooms are soft and shallots are translucent. Use a splash of vegetable broth if the veggies start to stick.
Step 3. Add the vegetable broth, non-dairy milk, nut butter, cornstarch, nutritional yeast, salt, and pepper. Stir well. Bring the mixture to a boil and stir until the sauce thickens.
Step 4. Remove the mixture from heat and stir in the green beans.
Step 5. Transfer the mixture to a medium sized** baking dish.
Step 6. In a small bowl mix the topping ingredients.
Step 7. Sprinkle the topping over the beans.
Step 8. Bake for 30 minutes. Let cool 5-10 minutes before serving. Enjoy!
FAQ & Expert Tips
Yes! This casserole can be prepared up to two days in advance. You have two options:
Option 1: Prepare the casserole through step 5, where you transfer the mixture to a baking dish. Then skip to step 8 and bake the casserole without the topping. Then on the day you'd like to serve, add the topping and heat at 250°F for 15-20 minutes until warmed through.
Option 2: Prepare only the onion/mushroom mixture, stopping after step 3. Refrigerate that mixture until you'd like to bake the casserole. On the day you'd like to serve, proceed with the recipe as written: toss in the beans, transfer to a baking dish, add the topping and bake for the time and temp written.
Store this casserole covered in the fridge for up to a week.
Recipe Prayer
Thank you God for this casserole. Thank your for this meal and our celebration of thanksgiving. Amen.
More Vegan Gluten-Free Thanksgiving Sides
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📖 Recipe
Vegan Gluten Free Green Bean Casserole
Ingredients
- 1 Pound Cremini Mushrooms thinly sliced
- 4 Medium Shallots sliced
- 6 Cloves Garlic minced
- 2 Cups Vegetable Broth
- ½ Cup Non-Dairy Milk
- ¼ Cup Nut Butter optional
- 2 Tablespoons Cornstarch
- 2 Tablespoons Nutritional Yeast
- 1 Teaspoon Salt
- ¼ Teaspoon Pepper
- 1 ½ Pounds Green Beans trimmed and sliced into 1" pieces (I measure the weight after trimming)
Topping
- ¾ Cup Breadcrumbs gluten-free if necessary - make sure they're also vegan!
- ¼ Cup Nutritional Yeast
- 1 Teaspoon Garlic Powder
- ½ Teaspoon Salt
Instructions
- Preheat the oven to 400°F.
- In a large skillet, sauté the mushrooms, shallots, and garlic over medium heat until the mushrooms are soft and shallots are translucent. Use a splash of vegetable broth if the veggies start to stick.
- Add the vegetable broth, non-dairy milk, nut butter, cornstarch, nutritional yeast, salt, and pepper. Stir well. Bring the mixture to a boil and stir until the sauce thickens.
- Remove the mixture from heat and stir in the green beans.
- Transfer the mixture to a medium sized** baking dish.
- In a small bowl mix the topping ingredients.
- Sprinkle the topping over the beans.
- Bake for 30 minutes. Let cool 5-10 minutes before serving. Enjoy!
Notes
Nutrition
Nutrition information is an estimate.
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