CrockPot Green Bean Casserole

Crispy, creamy Crockpot Green Bean Casserole is beyond easy. It’s just as tasty as the original oven-baked classic!

Crockpot Green Bean Casserole is a slow cooker version of one of my favorite dishes – and you can make this version before any guests arrive! For more must-make holiday side dishes, try Traditional Stuffing, Homemade Cranberry Sauce, and the BEST Mashed Potatoes.

Crock pot green bean casserole topped with crispy onions.

It’s Just as Good in the Slow Cooker!

We are big fans of Green Bean Casserole in our home. We stock up on fried onions so we can have it several times throughout the year!

I love having the option to cook this in a slow cooker. It allows more room in the oven for baking other items, and it’s as easy as dumping in the ingredients, and letting it do its thing. Perfect for Thanksgiving!

To achieve that crispy top, just pop it in the oven for a few minutes and you’re good to go.

This Crockpot Green Bean Casserole was super easy, and just as good as a baked casserole!

Frozen green beans in the slow cooker for crockpot green bean casserole.

Minutes to prep

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.

Crispy top. To top the casserole with crisp french fried onions, preheat the oven to 350°F. Spread half of the fried onions on a baking pan, bake for 5 min. Sprinkle the onions on top of the casserole when it’s done cooking.

Ingredients for slow cooker green bean casserole in the pot.

Crock Pot Tips

  • Preheat the crockpot while gathering the ingredients.
  • Low heat is about 200°F. One hour on high equals about two hours on low.
  • Use the right size crock pot. The beans should fill the pot between ½ and ¾ of the way. 
  • Avoid removing the lid. It takes 20 minutes for the pot to return to the set temperature.

Variations

This is a pretty simple, 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.
  • Replace the parmesan with another cheese, such as Mozzarella.
  • This recipe calls for frozen green beans, but you can use fresh green beans or drained canned beans.
  • Try Cream of Celery soup, Cream of Chicken soup, or one of my favorites – Cream of Chicken & Mushroom soup.

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.

Crockpot Green bean casserole in the slow cooker.

Storing Info

Make ahead of time. Prep this casserole 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.

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

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

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

Close up of crockpot green bean casserole in the slow cooker.

For More Veggie Sides, try:

Crockpot Green Bean Casserole Recipe

5 from 12 votes
Crispy, creamy Crockpot Green Bean Casserole is beyond easy. 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 French-fried onions divided

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 Kristyn

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?

  4. 5 stars
    This was delish! My dad even liked it better than the traditional oven baked green bean casserole. Not to mention it made a lot!

  5. 5 stars
    We love green bean casserole and I love having a way to cook it in the crock pot! I was able to step away from using cans of green beans.

  6. 5 stars
    I love your recipes! We just made your Fresh Green Bean Casserole last weekend for a Friendsgiving event and it was a hit! I am planning to make this recipe for Thanksgiving to free up oven space. Can you tell me what size Crock Pot you used for this? Thanks in advance!

    1. Oh thank you so much! I’m glad the casserole was a hit. Either a 5 or 6 quart crock pot would work great for this recipe!