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Slow Cooker Green Bean Casserole Recipe


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This Slow Cooker Green Bean Casserole recipe is a tasty meatless Thanksgiving or holiday side dish that is easy to make in the crockpot! 

Add your green beans, spices, and cream of mushroom soup on low heat, and add crunchy fried onions on top. A simple dump-and-go side dish for the holidays.

If you’re looking for a fantastic (and hands-off) meatless holiday side dish, this slow cooker green bean casserole is the perfect dish!  It’s rich and creamy (from a simple cream of mushroom soup!) and is an easy side dish in the crock pot.

With our dual American/Canadian household, you better believe we celebrate Thanksgiving twice each year!  I love prepping a big feast in early October for the Canadian celebration, and another one at the end of November for our American dinner. No holiday meal is complete without a creamy, luscious green bean casserole and this one hits the spot!

This Slow Cooker Green Bean Casserole Recipe Is:

  • Creamy
  • Fresh
  • Savory
  • Simple to Make
  • Flavorful
  • Loaded with Vegetables
  • Vegan, Vegetarian, and Gluten free!

A Great Vegetarian Holiday or Thanksgiving Side Dish

This slow cooker green bean casserole is a fantastic recipe for the holidays – add it to your Christmas, Thanksgiving, or Hanukah table and enjoy.  This will be one crowd pleaser side recipe everyone will love.  And this simple make-ahead dish is fantastic to prep ahead of time.

If you’re bringing this to a holiday potluck or family feast, check out my Thanksgiving hostess gift guide, or Holiday Christmas Hostess Guide for a thoughtful & affordable gift for your host.

What’s In This Crock Pot Green Bean Casserole Recipe?

Be sure to visit the recipe card below for full ingredient amounts and recipe instructions!

  • Green Beans, Mushrooms, Onions, Garlic
  • Extra virgin olive oil
  • Milk – you can use regular, coconut, or almond.
  • Worcestershire Sauce: for that unbelievably rich umami flavor, but make sure you use a vegan variety if you don’t eat meat (some can contain anchovies). 
  • Fried Onions – these great fried onions are gluten free and vegan, and contain no wheat or animal products. Or make your own fried onions in the air fryer.
  • Panko Breadcrumbs for the topping: use gluten-free if you avoid wheat… they have that amazing classic panko crunch, it’s unreal!

Make Green Bean Casserole Meatless

This meatless green bean casserole recipe is a fantastic take on the classic without all the dairy. I’m all about making recipes plant-based and meat free when I can. Vegetarian cooking does NOT have to be bland, boring, or flavorless… It’s quite the opposite when done right. You can achieve total richness and creaminess with some simple swaps.

By building meals around dairy free and vegan pantry staples(like coconut milk in this dish!) and swapping in a few plant-based ingredients you can make better meals for you and your family. These easy recipes are fantastic meatless and dairy free meals for your table.

More Vegetarian Holiday Side Dishes You’ll Love!

Meatless Baked Ziti Recipe

Honey Roasted Carrots Recipe 

Low Sodium Stuffing Recipe 

Creamy Garlic Carrots Recipe 

Whole Wheat Pretzel Bites Recipe with Sweet Herb Mustard

Get the Same Ingredients for this Gluten Free Vegetarian Green Bean Casserole in the Slow Cooker!

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If you made this recipe, please leave a star rating and let me know how it went in the comments below. I’d love to hear from you!

slow cooker recipe green bean casserole

Slow Cooker Green Bean Casserole

This easy vegetarian green bean casserole recipe is made in the slow cooker and perfect for a meatless Thanksgiving – an be made vegan as well.
5 from 9 votes
Prep Time 5 minutes
Cook Time 4 hours 10 minutes
Total Time 4 hours 15 minutes
Course Side Dish, Thanksgiving
Cuisine American
Servings 8
Calories 227 kcal


  • Slow Cooker or Crock Pot


  • 2 tablespoon olive oil
  • 1 large sweet onion diced
  • 4 cloves garlic minced
  • 2 pints mushrooms diced
  • 2 lbs Fresh green beans ends trimmed
  • 1 14 ounce can coconut milk full fat
  • 1 cup plain unsweetened almond milk or other milk alternative
  • 1 tablespoon Worcestershire sauce make sure to use a vegan version
  • 1 tablespoon onion powder
  • 1/2 cup seasoned breadcrumbs gluten free
  • 2 cups fried onions divided


  • In a large pot, heat the olive oil until shimmering on medium heat.  Add the onion, garlic, and mushrooms, and saute on low for 8 minutes.  Transfer to a slow cooker.
  • To the same pot, fill with 4 cups water and bring to a boil.  Add the fresh green beans and cook for 5 minutes.  Beans should be a bright green color and slightly al dente.  Drain, and add beans to the slow cooker.
  • Add the rest of the ingredients to the slow cooker: coconut milk, almond milk, Worcestershire sauce, onion powder, GF breadcrumbs,  and 1 cup of the fried onions (reserve a half cup of the green beans for top of casserole later).
  • Mix and cook on high for 3-4 hours, until bubbling. Once finished, top with remaining fried onions and enjoy!
  • Optional Step – Grease a 13 x 9 casserole dish and transfer green bean mixture into dish.  Top with remaining fried onions, and broil for 5 minutes until the top begins to crisp.


Calories: 227kcalCarbohydrates: 26gProtein: 7gFat: 12gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gCholesterol: 1mgSodium: 293mgPotassium: 692mgFiber: 5gSugar: 8gVitamin A: 799IUVitamin C: 19mgCalcium: 109mgIron: 2mg
Did You Make This Recipe?Please leave a rating and comment below, let us know what you loved about it!

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  1. I’m thinking about making this for Thanksgiving but am slightly nervous. Does the sauce thicken in the slow cooker? Is that the purpose of the breadcrumbs?

5 from 9 votes (9 ratings without comment)

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