Slow Cooker Green Bean Casserole
129 Comments Oct 13, 2020
Updated Nov 13, 2023
This post may contain affiliate links. Please read our disclosure policy.
Slow Cooker Green Bean Casserole is a staple for Thanksgiving and Christmas. My recipe follows the classic recipe but made in the slow cooker.
My family can not go without the Green Bean Casserole. It’s pretty much the best side dish for Thanksgiving or Christmas (well, besides the slow cooker mashed sweet potatoes and slow cooker stuffing).
Table of Contents
- How to make Green Bean Casserole in the Crock Pot:
- How long do I cook?
- How can I brown the French fried onions without an oven?
- Can I use fresh or frozen green beans instead of canned?
- What other green bean sides can I make in the slow cooker?
- How long can I keep this on the warm setting after cooking?
- More holiday side dishes we can’t live without:
- Slow Cooker Green Bean Casserole Recipe
This recipe for Slow Cooker Green Bean Casserole makes a ton. When I make this for Thanksgiving, it feeds about 15, with lots of leftovers. I think this recipe will serve up to 20 people.
How to make Green Bean Casserole in the Crock Pot:
My recipe is very close to the original green bean casserole recipe from Campbell’s but enough to feed a crowd. Though, I skip the soy sauce in my recipe.
- Green beans – I use canned
- Cream of mushroom soup – 3 cans in this recipe, this makes for a very saucy casserole
- Milk – This helps thin out the soup
- French Fried Onions – These are what make the dish. Be sure to see my tip on how to brown them.
- Seasonings – Just pepper and onion powder. No salt needed, the green beans and cream of mushroom soup have PLENTY of salt added.
How long do I cook?
- Place the lid on the slow cooker.
- Cook on HIGH for 2.5 hours without opening the lid during the cooking time.
How can I brown the French fried onions without an oven?
- Place the onions in a dry skillet set to medium-high heat on the stove-top.
- Use a spoon and stir around the onions, for about 3 minutes or until browned.
- Sprinkle over the green bean casserole and serve!
Can I use fresh or frozen green beans instead of canned?
- Use 10 cups fresh (trimmed and cut) or frozen green beans instead of canned.
- Cook for 3.5 on high or until the green beans are tender.
What other green bean sides can I make in the slow cooker?
- Slow Cooker Cheesy Green Bean Casserole
- Slow Cooker Green Beans and Bacon
- Slow Cooker Green Beans and Potatoes
- Slow Cooker Bacon Green Bean Casserole
How long can I keep this on the warm setting after cooking?
- You can keep this on the warm setting for 3 hours.
- Though keep an eye on it and make sure the edges aren’t scorching, stir or turn off if the edges are getting too hot.
More holiday side dishes we can’t live without:
- Slow Cooker Candied Yams
- Slow Cooker Cranberry Sauce
- Slow Cooker Mashed Potatoes
- Slow Cooker Acorn Squash
- Slow Cooker Butternut Squash
- Slow Cooker Stuffing
Want to make more magic in your crockpot? Stay up to date and subscribe to my newsletter and follow along on Facebook, Instagram, Pinterest and YouTube.
Slow Cooker Green Bean Casserole
Is any holiday meal complete without the classic Green Bean Casserole? Free up oven space by using your slow cooker.
Equipment
Ingredients
- 31.5 oz. cream of mushroom soup, (three – 10.5 oz cans)
- 1/2 cup milk
- 1/8 tsp black pepper
- 1/8 tsp onion powder
- 145 oz. green beans, (Ten – 14.5-oz cans; drained)
- 12 oz. French's French Fried Onions, (Two – 6-oz canisters)
- non-stick cooking spray
Instructions
- Spray the slow cooker with the non-stick cooking spray if desired.
- Add the drained green beans to your slow cooker.
- In a medium-size bowl, whisk the cream of mushrooms soup, milk, black pepper, and onion powder until smooth.
- Pour the soup mixture over the beans. Add half (one canister) of the french friend onions. Stir gently.
- Place the lid and cook on HIGH for 2½ hours.
- Brown the remaining canister of French fried onions in a skillet on the stove top. Set the skillet to medium high heat, stir the onions around until brown (about 3 minutes).
- Sprinkle the onions over and serve. (If you are traveling, you can brown your onions at home then add them to the slow cooker right before serving).
How to Video
Sarah’s Notes
Can I use fresh (trimmed and cut) or frozen green beans?
- Use 10 cups fresh (trimmed and cut) or frozen green beans instead of canned.
- Cook for 3.5 hours on high or until the green beans are tender.
- Remove the slow cooker insert from the heating element and place it in the oven WITHOUT the lid.
- Cook for 10 minutes at 350°F or until the onions are browned.
- OR place the onions in a small dish in the oven for 10 minutes or until browned, then sprinkle over the casserole.
Nutrition
Calories: 201.71kcal | Carbohydrates: 24.1g | Protein: 6.06g | Fat: 10.01g | Saturated Fat: 4.3g | Cholesterol: 2.9mg | Sodium: 480.77mg | Potassium: 499.33mg | Fiber: 5.64g | Sugar: 7.01g | Vitamin A: 1428.07IU | Vitamin C: 25.07mg | Calcium: 84.77mg | Iron: 2.44mg
Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.
Made this recipe? Leave a comment below!
Hasn’t been my favorite green bean casserole recipe I’ve made, but all of my coworkers really liked it.
I would definitely add cheese to this (mixed into the beans and soup mix).
Very easy to throw together and bring to work for a carry-in, cleanup seems like it will be pretty simple too.
If I were to do this on low how long would I do it for?
I think low for 5 hours will work fine.
I just woke up thinkn Low & Slow can be best …and today it is. I am googling & searching and VOILÀ…youre recipe that i am using to scroll to the bottom of and find this ever so helpful tidbit‼️ Happy Thanksgiving
I omit the cream of mushroom so what other cream can use for beans?
Hi! You will to make a sauce from scratch like this recipe: https://sallysbakingaddiction.com/creamy-green-bean-casserole-from-scratch/
I have a mushroom allergy so I always use cream of celery soup as a great substitute for cream of mushroom soup in all recipes and have done this plenty of times for this one. Nobody can tell…..
We have a mushroom allergy for one of our thanksgivings this year. I did the same, it was just as good!
Wondering if anyone has used french-style canned green beans instead of traditional cut? When we make the regular oven casserole we always use french style and I am really hoping it translates to the crockpot.
Yes, those work great.
Hello! If I half this recipe will it still take the same amount of time to cook?
I think it will take about 2 hours on high.
Hello. Can I make this two Days prior and then reheat in oven? If so whats best way to do it.!?
Renée
There is no need to cook this twice, you could make it two days ahead of time and put in fridge. Then cook in slow cooker or in oven.
When reheating in oven after being in fridge for two days, how much time is needed to be ready to serve?
Hi Linda. I have done this before. I would do 3.5 hours on high and gently stir once towards the end.
How can I use frozen green beans?
I’m making this for a schools friendsgiving and planned on making this at home the night before. How would I go about with heating it up before we serve it?
Don’t cook it the night before (you can get it ready though and put in the fridge. Can you slow cook for the amount of time the recipe says before taking it in? (set an early alarm if needed).
It wasn’t bad, but not how I wanted to to taste. Very bland, needs way more seasoning than listed above. Once I added my own, it tasted better.
Can I use fresh string beans instead of canned?
Yes!
You state…..set the cooker on warm until ready to serve.
When you serve, do you turn cooker off? Leave on warm? Do you leave casserole in the same heating element when you serve?
You can keep it on warm. Just keep an eye on it.