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Classic Slow Cooker Green Bean Casserole

This Classic Slow Cooker Green Bean Casserole recipe is a favorite for the holidays. Just a few simple ingredients to mix together in the Crock Pot for a delicious side dish that everyone enjoys.

spoon full of classic slow cooker green bean casserole with a crock pot full in the background

Holiday Favorite Side Dish

Many holiday side dishes are staples, like corn casserole, and sweet potato casserole. They are so delicious that often they become more of a favorite than the main dish.

Green Bean Casserole is a classic side dish that completes any holiday like Thanksgiving and Christmas. It is so simple to make with canned green beans, cream of mushroom soup, and a crunchy onion topping. This recipe is the best since it is made in the Crock Pot and only takes minutes to prepare. Just mix, cook, and enjoy!

Why You Will Love This Recipe

So creamy, savory, and delicious!

Easy to make using only a few ingredients.

Ready to cook in only 5 minutes.

A favorite side dish at Thanksgiving and Christmas.

side view of the green bean casserole finished with crispy onion topping

Ingredients

  • Canned green beans– this recipe includes both regular and french cut green beans. This makes a nice balance in texture. Easily swap out either style to suit your taste.
  • Cream of mushroom soup– the base of the casserole that gives such a nice creamy and savory taste.
  • Milk– any type will work for this dish.
  • Soy sauce– while optional, a little dash gives a nice zippy flavor.
  • Salt & pepper
  • French Fried Onions– these fried onion rings taste amazing with the green beans, bringing a much-needed savory onion flavor and a crunchy top.

How to Make Green Bean Casserole

This casserole is so easy to make. All you have to do is:

  1. Dump in the slow cooker: In the bottom of a large crock pot, add cream of mushroom soup, milk, soy sauce, salt, and pepper, and mix it all together with a wooden or plastic spoon. Do not use a metal spoon since it could scratch the bottom of the pot. Add the green beans and half of the french fried onions and gently stir to combine.
  2. Cook: Cover the crock pot and cook on high for 2-3 hours, or until it is hot and bubbly.
  3. Top and enjoy: Remove the lid and stir again. Top with the remaining onions and serve.
  4. Store: Cover and place any leftovers in the refrigerator for up to 4-5 days.
  • See the printable recipe card below for more detailed instructions.

Baking Options

Green Bean Casserole can also be made in the oven. Prepare as directed in a 9×13″ pan but do not add the french fried onions on top. Bake in the oven at 350 degrees Fahrenheit for 35-40 minutes until hot. Remove from oven, top with remaining onions, and cook an additional 10 minutes.

Make-Ahead Options

Yes, this casserole can be made up to 24 hours ahead of time. Just prepare in the slow cooker pot without adding the french fried onions. Cover and refrigerate. When ready to cook, remove from the refrigerator and allow the pot to come to room temperature to prevent it from cracking. Stir in half the onion and follow the remaining directions. It may need a few more minutes of cook time.

a crock pot with a wooden spoon that is filled with green bean casserole

Frequently Asked Questions

Can I keep green bean casserole on warm in the slow cooker?

Yes, this recipe can be kept on warm in the slow cooker for up to 3 hours before needing to be served or stored in the refrigerator.

Can I use fresh green beans?

Slow Cooker Green Bean Casserole is made with canned green beans for ease of use and delicious flavor. Fresh or frozen green beans can be easily substituted. Be sure they are cleaned and trimmed.

Do I have to use cream of mushroom soup in green bean casserole?

Any cream soup can be used as a substitute for this recipe with similar results, such as cream of chicken or cream of celery.

a wooden spoon in a crock pot of green bean casserole

Helpful Tips

* Add the onions on the top right before serving. If covered with a lid, the onions will start to soften and become less crispy.

* If using fresh green beans, clean and trim the ends.

* Try adding cheese for a different variety. Cheddar or Parmesan would taste delicious!

Did you try this recipe? Please leave a ⭐ review below and tag me @whiskfulcooking on Instagram, Facebook, Pinterest, and YouTube!

spoon full of classic slow cooker green bean casserole with a crock pot full in the background

Classic Slow Cooker Green Bean Casserole

Braghan
This Classic Slow Cooker Green Bean Casserole recipe is a favorite for the holidays. Just a few simple ingredients to mix together in the Crock Pot for a delicious side dish that everyone enjoys.
5 from 1 vote
Prep Time 5 minutes
Cook Time 2 hours
Total Time 2 hours 5 minutes
Course Side Dish
Cuisine American
Servings 10
Calories 178 kcal

Ingredients
  

  • 4 (14.5 ounce) cans green beans, drained regular or french cut
  • 2 (10.5 ounce) cans cream of mushroom soup
  • 1/2 cup milk
  • 1 teaspoon soy sauce
  • salt and pepper to taste
  • 6 ounces french fried onions divided

Instructions
 

  • In the bottom of a large crock pot, mix together cream of mushroom soup, milk, soy sauce, salt and pepper with a wooden or plastic spoon. Gently stir in green beans and half of the french fried onions.
  • Cover and cook on high for 2-3 hours or until hot and bubbly. Remove the lid and stir again. Sprinkle the remaining french fried onions evenly over the top. Serve immediately.

Notes

Storage:
  • Store leftovers covered in an air-tight container in the refrigerator for 4-5 days.
Make ahead option:
  • Prepare in the slow cooker pot without adding the french fried onions. Cover and refrigerate for up to 24 hours. When ready to cook, remove from the refrigerator and allow the pot to come to room temperature to prevent it from cracking. Stir in half the onion and follow the remaining directions. It may need a few more minutes of cook time.
Baking option:
  • Prepare as directed in a 9×13″ pan but do not add the french fried onions on top. Bake in the oven at 350 degrees Fahrenheit for 35-40 minutes until hot. Remove from oven, top with remaining onions, and cook an additional 10 minutes.
Helpful tips:
  • Fresh green beans can be used in place of canned. Wash and trim the ends before adding them to the slow cooker.
  • Add the fried onions on top right before serving. Once the lid is placed back on top, the onions start to soften.
  • Cook times and nutritional values are estimates due to variations in cookware and ingredient brands.

Nutrition

Serving: 10gCalories: 178kcalCarbohydrates: 23gProtein: 3gFat: 8gSodium: 331mgSugar: 3g
Tried this recipe?Let us know how it was!
Nutrition Facts
Classic Slow Cooker Green Bean Casserole
Serving Size
 
10 g
Amount per Serving
Calories
178
% Daily Value*
Fat
 
8
g
12
%
Sodium
 
331
mg
14
%
Carbohydrates
 
23
g
8
%
Sugar
 
3
g
3
%
Protein
 
3
g
6
%
* Percent Daily Values are based on a 2000 calorie diet.

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5 from 1 vote (1 rating without comment)

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