Crock Pot Green Bean Casserole

Crispy, creamy crock pot green bean casserole is beyond easy and delish. It’s just as tasty as the original oven-baked classic.

This easy green bean casserole has always been one of my favorite dishes. You can make it before any guests arrive, and it is oh so easy to throw together. For more must-make sides check out Traditional Homemade Stuffing, Homemade Cranberry Sauce, and the BEST Mashed Potatoes.

Crock pot green bean casserole

It’s Just as Good in the Slow Cooker!

We are big fans of this green bean casserole in our home. We stock up on fried onions so we can have this several times throughout the year!

I love having the option to cook this in a slow cooker. It allows me more room in the oven for baking other items, and it’s easy as dumping in the ingredients and letting it do it’s thing. To achieve that crispy top, just pop it in the oven for a few minutes and you’re good to go.

This casserole was super easy, and just as good as a baked casserole!

Frozen green beans in the crock pot

How to Make It

COMBINE. Add the green beans to the crock pot. In a medium bowl, mix together the cream of mushroom soup, milk, parmesan cheese, salt, and pepper. Pour the soup mixture over the green beans and stir to combine. Stir in half of the French-fried onions.

COOK. Cover and cook on low heat for 4 hours. Just before serving, sprinkle with the remaining French-fried onions.

French Onions:  If you want to top the casserole with crisp french fried onions, then preheat the oven to 350°F. Spread half of the fried onions on a baking pan and bake for 5 min. This will crisp them up and you can sprinkle them on top of the green bean casserole.

Ingredients for slow cooker green bean casserole in the pot

Variations

This is a pretty simple and classic recipe and is delicious as is. However, you can easily change it up! Here are a few ideas…

  • Add crumbled bacon or shredded cheese to the top.
  • Change the kind of cheese—you can replace the parmesan with another cheese such as Mozzarella. 
  • This recipe calls for frozen green beans, but you can use fresh or canned beans.

NOTE: Typically 1 can of green beans is about 14.5 oz which is about 8 oz frozen beans or ¾ lb fresh. For this recipe you’ll need 2 ½-3 lb fresh or 24-32 oz frozen beans.

Green bean casserole in the crock pot

Making Ahead + Storing Info

You can prep this casserole to MAKE AHEAD OF TIME, but don’t add the french fried onions on top. Cover the casserole and keep in the fridge. When you’re ready, heat the casserole in the crock pot and add the onions as directed in the recipe.

After cooking this casserole can be left in the slow cooker on warm for up to 2 hours.

You can STORE leftover casserole in an airtight container in the fridge for up to 3 days.

REHEAT in the microwave or the oven. To crisp up the french fried onions, place the leftovers under the broiler for a couple of minutes.

Close up of green bean casserole in the slow cooker

For More Veggie Sides, try:

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Crock Pot Green Bean Casserole Recipe

5 from 4 votes
Crispy, creamy crock pot green bean casserole is beyond easy and delish. It's just as tasty as the original oven-baked classic.
Course Side Dish
Cuisine American
Prep Time 5 minutes
Cook Time 4 hours
Total Time 4 hours 5 minutes
Servings 12
Calories 130 kcal
Author Lil' Luna

Ingredients

  • 2 16 ounce packages frozen green beans
  • 2 10.75 ounce cans cream of mushroom soup
  • 2/3 cup milk
  • 1/2 cup grated parmesan cheese
  • 1/2 teaspoon salt
  • 1/4 teaspoon pepper
  • 1 6 ounce can French-fried onions

Instructions
 

  • Add the green beans to the crock pot. In a medium bowl, mix together the cream of mushroom soup, milk, parmesan cheese, salt, and pepper. Pour the soup mixture over the green beans and stir to combine. Stir in half of the French-fried onions.
  • Cover and cook on low heat for 4 hours. Just before serving, sprinkle with the remaining French-fried onions.

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About the Author

Kristyn Merkley

My name is Kristyn and I’m the mom of SIX stinkin’ cute kids and the wife to my smokin’ hot hubby, Lo. My mom’s maiden name is Luna, and I’m one of the many crafty “Lil’ Lunas” in the fam. On this site I like to share all things creative - from recipes to home decor to gifts and home decor ideas. Welcome!

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Comments:

  1. 5 stars
    I always run out of oven space during the holiday cooking, so making use of my slow cooker is such a helpful idea. Thank you for sharing!

  2. 5 stars
    You totally saved my stress level for the holidays! Not having to make this in the oven and freeing up that space is such a life saver. Wouldn’t be the holidays without this casserole.

  3. 5 stars
    Some crockpot recipes call for frozen green bean some canned. I feel like this would make a big difference. Any advice on this?