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Home Β» Soup Β» Vegan Gluten-Free Green Bean Casserole

December 10, 2020

Vegan Gluten-Free Green Bean Casserole

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This vegan, gluten-free green bean casserole is not your childhood casserole of canned soup and green beans. It’s waaay better. Fresh green beans and a from-scratch mushroom soup bursting with umami will knock your socks off. I couldn’t stop eating it after my first bite!

close up of spoon with vegan gluten-free green bean casserole with baking dish and grean beans in background

Please don’t be intimidated by the from-scratch soup. I have kept the ingredients to a minimum and it takes just a few minutes to mix up. If you buy ready sliced mushrooms there is very little prep time. If you don’t need a vegan soup, here is my recipe for Creamy Gluten-Free Mushroom Soup.

Vegan Mushroom Soup

overhead view of fresh crimini mushrooms and sprigs of fresh thyme on burlap mat
Crimini Mushrooms and Fresh Thyme

I elevate this casserole to something a little more grown up than you’re used to. The mushroom soup includes:

Crimini mushrooms are also known as baby portobellos and have much more flavor than white button mushrooms.

The addition of white wine, which is fantastic with mushrooms, gives a little pop of acid to the soup and casserole. If you prefer not to use wine, replace it with a tablespoon of lemon juice+2 Tbsp water.

The remainder of the liquid for this creamy soup is vegetarian broth. My all time favorite, and the only veg broth I use, is Imagine Low-Sodium “No-Chicken Broth.” It has a perfect neutral yet savory flavor that is perfect in soups.

Thyme is also fantastic with mushrooms. If you can find fresh thyme, use the leaves from 2 sprigs. Dried thyme will work too if you can’t find fresh.

Vegan parmesan cheese or nutritional yeast also gives a wonderful tang to this soup. If you haven’t tried nutritional yeast yet and miss the flavor of a tangy cheese, this is the answer! It can be found in natural foods markets and Trader Joe’s.

The soup is thickened with a flour and vegan butter roux. Many of the vegan butters are quite salty but Earth Balance now makes unsalted vegan buttery sticks. They work well in this recipe and allow you to better control the salt level. If you use a salted version, you may need to reduce the amount of salt added. For this recipe I used King Arthur All purpose Gluten-Free Flour. A gluten-free flour blend works best for this recipe, as opposed to using a single flour.

Casserole Ingredients

vegan gluten-free green bean casserole in white baking dish with chive topping. Wood board and gray napkin underneath. whole crimini mushrooms in front and small wood bowl with green beans on left.

I highly recommend using fresh green beans and giving them a quick blanch. See the the recipe card for blanching instructions. It will gently cook them and bring out the beautiful bright green color. Frozen green beans are a good option if fresh are not available. Defrost them on an absorbent towel.

Ready-made gluten-free crispy fried onions are FINALLY appearing in the market!!! For years I would make my own or use a combo of bread crumbs with onion powder. Hopefully you will be able to find them too. If you are feeling very motivated, make your own using my recipe for gluten-free onion rings. Follow the recipe as is, but slice the onion super thin,

If all else fails, my favorite hack is to toss some crushed up gluten-free Rice Chex with butter and onion powder and bake until dry.

Mini Green Bean Casserole

This casserole is such a crown-pleaser that I have made individual sized ones as an appetizer. I think that it turns this rustic dish into something a little more elegant yet fun. Use small ramekins or any oven-safe bowl.

Continue to Content
gluten free vegan green bean casserole in white baking dish on green napkin and wood board. Fresh mushrooms and wood bowl with sliced green beans on left. Serving spoon in front

Vegan Gluten Free Green Bean Casserole

Yield: 8 servings
Prep Time: 20 minutes
Cook Time: 20 minutes
Total Time: 40 minutes

This vegan gluten-free green bean casserole is elevated to new flavor heights with wine, thyme and vegan parmesan cheese for a burst of umami.

Ingredients

  • 6 ounces crimini mushrooms chopped
  • 1/4 tsp dried thyme or leaves from 2 large sprigs of fresh thyme
  • 3 Tbsps vegan butter (unsalted preferred)*
  • 3 Tbsps gluten-free flour blend
  • 1 c vegan, low sodium broth
  • 1/4 c white wine
  • 1/4 c vegan parmesan cheese or 2 Tbsp nutritional yeast
  • 1/2-3/4 tsp salt
  • 12 oz green beans (fresh preferred)
  • 1 1/2 c crispy fried onions

Instructions

For fresh green beans

  1. Cut the green beans into 1" pieces.
  2. Blanche - Drop them in a pot of salted boiling water. Cook 2 minutes and transfer them to a bowl of ice water.
  3. When the beans are cooled. Transfer to an absorbent towel to dry.

For frozen green beans

  1. Thaw them on an absorbent kitchen towel until dry

Make the Mushroom Soup

  1. Sautee the mushrooms and thyme in 1 tbsp of the vegan butter.
  2. Remove the mushrooms from the pan and set aside.
  3. Add the flour and remaining 2 Tsbsp butter. Heat over a medium low flame, stirring until the mixture is uniform - about 1 minute.
  4. While stirring with a whisk, add the broth and wine and turn the flame to high.
  5. Mix until the liquid boils and thickens. Remove from the heat.
  6. Stir in the mushrooms and and vegan parmesan or nutritional yeast.
  7. Add just 1/4 tsp of the salt and taste. Add the remaining if needed, 1/4 tsp at a time.
  8. Stir in the green beans.
  9. Transfer to an 8" baking dish and top with the crispy fried onions.

Notes

*I recommend Earth Balance Unsalted Vegan Buttery Sticks,

Recommended Products

  • Low Sodium Vegetarian No-Chicken Broth
    Low Sodium Vegetarian No-Chicken Broth

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© Janet Harlow
Cuisine: American / Category: Side Dishes
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Posted In: Side Dishes, Vegan · Tagged: dairy-free, mushrooms, soup

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