Slow Cooker Green Bean Casserole
134 Comments Oct 13, 2020
Updated Mar 31, 2025
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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).
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
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Slow Cooker Green Bean Casserole
How to Video
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).
Sarah’s Notes
- 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
Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.
Why would you need to waste your crock pit/ slow cooker on some thing that takes 5 min to make and only 30 min in oven?
Hi Susy! The crockpot wastes nothing! I can’t cook ANYTHING in my oven because of my turkey, so the slow cooker is PERFECT.
Great recipe but a suggestion save yourself some clean up, just mix the soup mix and milk in the crockpot and season then add the beans saves you a cleanup, , we have enough clean up with Thanksgiving