Slow Cooker Green Bean Casserole
129 Comments Oct 13, 2020
Updated Nov 13, 2023
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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).
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
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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!
Can I make this the day before and refrigerate?
Yes, that should do fine.
I strongly advise against using fresh green beans for this recipe. I’ve made it, using canned green beans, for Thanksgiving 2021 and Thanksgiving 2022, and it was delicious and got rave reviews. This year, I decided to use fresh green beans instead of canned. Big misake. The green beans were undercooked, even after three hours in the crock pot, and the entire casserole was too soupy. I have no idea why using fresh green beans in place of canned made the casserole too soupy, but it did. I’m giving the recipe 5 stars because it’s delicious if made with canned green beans, and plan to redeem myself for 2023 by making it with canned beans for Christmas.
WOULD LOVE TO MAKE THIS RECIPIE , BUT THERE’S ONLY MY WIFE & MYSELF , HOW CAN I SCALE BACK THE QUANTITIES TO MAKE THIS FOR US
You could cut this in half and then freeze the other half for an other meal.
Only 1/2 cup of milk? Doesn’t seem like enough
Yes, the soup alone is almost the right consistency.
Yes, I agree. I added one-half cup more milk and I plan to add even more than that next time.
This recipe is amazing, though. My family LOVES it
Do you have to brown the 2nd can of French fried onions that you add before serving?
You don’t have to brown them but they taste better if you do. I brown them in a dry skillet or in a bowl in the oven.
How long would I cook this on low? I need to be gone for about 4 hours and it would be overcooked. Thank you!
4 hours on low would work great.
I need more than this makes but I don’t want to double. I have an 8qt slow cooker. I was going to adjust and add about 1/3 more of everything to make sure it fits in my cooker. Do I need to add additional time that it cooks? How much?
It won’t need much more time, probably just 30 minutes. It’s all mostly cooked, room temperature items.
Sounds great but what is the serving size? As a diabetic i need to know that for the carb count.
I see the grams listed but not the serving size.
Hi, I do not have serving sizes, I apologize.
I plan to make this for Thanksgiving dinner. 20 servings is too much. Could I half the recipe and cook it in a casserole shaped crockpot? Is it necessary to half each ingredient exactly?
Thanks!
Kat L.
I would try to stick to half of the recipes closely so you don’t end up with too dry or too wet green bean casserole.