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 mashed potatoes).
This recipe for Slow Cooker Green Bean Casserole makes a ton, when I made this for thanksgiving, it fed about 15, with lots of leftovers. So, I would think this recipe will serve up to 20 people.
How to make Green Bean Casserole in the Slow Cooker:
You will need these ingredients:
- 32¼ oz. cream of mushroom soup (three – 10¾ oz cans)
- ½ cup milk
- ⅛ tsp black pepper
- ⅛ 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
Directions:
- In a very large bowl, whisk the cream of mushrooms soup, milk, black pepper, and onion powder until smooth.
- Stir in the drained green beans.
- Gently fold in 1 canister of French fried onions with a rubber spatula into the green bean mixture, taking care to not break the green beans.
- Spray the slow cooker with the non-stick cooking spray.
- Pour the green bean mixture into the slow cooker.
- Place the lid and cook on HIGH for 2½ hours.
- If your slow cooker is oven safe, sprinkle the remaining canister of French fried onions to the top of the casserole.
- 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.
- Set the insert back into the slow cooker heating element, replace the lid, and set the slow cooker to WARM until ready to serve. Enjoy!
I don’t have an oven to brown the French Fried Onions, how can I brown them?
Place the onions in a dry skillet set to medium-high heat on the stove-top. Use a spoon and stir around 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 8 cups fresh (trimmed and cut) or frozen green beans instead of canned.
- Cook for 3.5 – 4 hours or until the green beans are tender.
What other versions of green bean casserole can I make in the slow cooker?
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.
Prep Time: 10 minutes
Cook Time: 2 hours 40 minutes
Total Time: 2 hours 50 minutes
Servings: 20
Calories: 201.71kcal
Equipment
- Slow Cooker- 6 quart or larger-oval
Ingredients
- 32¼ oz. cream of mushroom soup (three – 10¾ oz cans)
- ½ cup milk
- ⅛ tsp black pepper
- ⅛ 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
- In a very large bowl, whisk the cream of mushrooms soup, milk, black pepper, and onion powder until smooth.
- Stir in the drained green beans.
- Gently fold in 1 canister of French fried onions with a rubber spatula into the green bean mixture, taking care to not break the green beans.
- Spray the slow cooker with the non-stick cooking spray.
- Pour the green bean mixture into the slow cooker.
- Place the lid and cook on HIGH for 2½ hours.
- If your slow cooker is oven safe, sprinkle the remaining canister of French fried onions to the top of the casserole.
- 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.(if you do not have an oven to brown the onions, see my notes below)
- Set the insert back into the slow cooker heating element, replace the lid, and set the slow cooker to WARM until ready to serve. Enjoy!
Notes
Can I use fresh (trimmed and cut) or frozen green beans?
- Use 8 cups fresh (trimmed and cut) or frozen green beans instead of canned.
- Cook for 3.5 – 4 hours or until the green beans are tender.
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
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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.
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).
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.
So we are camping this year for Thanksgiving and its why I searched for a crock pot recipe, has anyone done this without final step of putting it in oven with the onions? I myself think the onions are great with out being cooked. what are your thoughts?
A new thing I just started doing is browning them in a skillet right before serving.
Great idea, Sarah Olson! I think I’ll do that for my hub’s office Christmas Dinner. He signed me up for green beans, and I refuse to make plain old beans.
I need to travel about 1hr and 45 min to our Thanksgiving Day destination. Do you think this would still cook well if I got everything in the crock pot-traveled with it and then turned it on?
Yes! I plan to do the same. I’m going to make mine the night before and put in the fridge until we travel. Nothing is that perishable.
What can I do if I only have a 4 quart crock pot?
I would cut the recipe in half? The measurements don’t need to be exact, it always turns out no matter what measurements I use.
I don’t like cream of mushroom soup, so I found a recipe that substitutes sour cream. Work that work with the crockpot? Or would i need to add more milk?
I’m allergic to mushrooms, can I substitute the cream of mushrooms for cream of celery.
Yes, I think that would work great.
I’ve also heard of cream of bacon soup being used instead too
Instead of putting the crockpot insert into the oven to brown the french fried onions I would put them in a separate pan in the oven, and after browning… then sprinkle them onto the casserole in the crockpot. Less chance of causing the insert to crack by placing it into the oven.
Great tip! Thank you!
I’ve made this the past two years for Thanksgiving and it’s always a hit! I make it just like the recipe says! Sooo amazing!!
Sarah, I did have one question… This year we are traveling quite a ways for Thanksgiving and was thinking to avoid getting up super early to make this. Could I just let it cook in the crockpot overnight on low?
I think that would be too much time. Maybe 5 hours on low would be the most it should go.
Has anyone used frozen green beans?
I have cooked this casserole for many years and in many ways.(I’m 65 and have been cooking since I was 13.) Lately, I use fresh sliced mushrooms sautéed with sliced green onions (white and green parts) and do not use the fried onion rings-too much fat!. Sometimes all sautéed with bacon. You could use leeks or shallots and I always add some fresh chopped garlic because we love garlic at my house. I also use some panko bread crumbs mixed with grated parmesan cheese and a little melted butter for the topping. Instead of milk I use reduced salt chicken broth. I prefer to use fresh green beans that are parboiled for a tender crisp stage and then mix up all the other ingredients first and gently fold in the beans so they don’t get broken. In a pinch, I use canned beans, but drain them well to remove some of the salt. You can also just cover the top with your favorite cheese. I have used frozen green beans but they have to at least be unthawed in the microwave first. I usually use the oven but I am going to use the crock pot this Turkey Day!
Great additions Jo! Cheese and garlic sound so good!
I’m so glad I have found your site…love reading and sharing recipes that are good, but simple to make! I do have one issue….I don’t know if it is the font you have chosen to use or the color of your sites print….but it is very straining on the eye….suggestions that would help me to improve this?
The only thing I can think of is if you can get the print of your browser to show larger. For mine on internet explorer I can adjust it on the top right tab to 125% and that helps.