With tender green beans in a creamy mushroom sauce and crispy fried onions on top, this easy crockpot green bean casserole is going to be the hit of the holidays. Made in a slow cooker to save oven space, it also travels easily and stays warm for hours!
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Why You’ll Love Crockpot Green Bean Casserole Recipe
This easy, festive, no-fuss, green bean casserole recipe is always a crowd favorite! Here’s why:
- Easy: A simple classic with slow cooker convenience, a handful of ingredients, and little prep. We keep coming back to this creamy slow cooker green bean casserole year after year!
- Convenient: Not only do you save oven space, but this crock pot green bean casserole travels with ease and stays warm for hours!
- Nostalgic: This is the classic recipe from your childhood that you looked forward to all year long with the added convenience of hands-off cooking.
- Super Savory: Creamy white mushroom sauce, perfectly seasoned tender green beans, and crunchy French fried onions create the perfect bite. It’s no wonder this recipe stands the test of time, year after year!
If you are looking for a homemade version, don’t miss this recipe for my very favorite green bean casserole from scratch! Or, I also have an easy green bean casserole that you make in the oven and this decadent cheesy green bean casserole.
What You’ll Need
While there are lots of versions out there, this one keeps things simple. Check the recipe card at the bottom of the post for exact amounts.
- Mushroom Soup: Use condensed cream of mushroom soup and don’t dilute it with water. Use as is.
- Milk: A little milk thins the sauce to just the right consistency.
- Soy Sauce: This ingredient may be surprising, but it adds depth and an umami flavor. You could also use tamari or coconut aminos.
- Black Pepper: Freshly ground black pepper will give you the best taste.
- French Fried Onions: Typically sold near the canned veggies or next to salad toppings like croutons.
- Parmesan Cheese: A little more for the topping adds an elegant touch to this homey dish.
- Cheddar Cheese: Use freshly grated cheese.
- Green Beans: I use whole frozen green beans and snip off any tough ends, but fresh green beans steamed in the microwave on high for 5 minutes will work too.
How to Make Green Bean Casserole in Crock Pot
This truly is a mix-and-cook, set-it-and-forget-it side dish. Here’s how to make it, step by step.
- Combine: Add the mushroom soup, milk, soy sauce, and pepper to your slow cooker and stir to combine. Then stir in half of the crispy fried onions, half of the parmesan cheese, and all of the cheddar cheese.
- Green Beans: Stir in the frozen green beans. Then sprinkle the remaining parmesan cheese on top, followed by the remaining French fried onions.
- Cook: Cover and cook on low for 3 hours or on high for 2 hours, until the onions are golden brown and the edges are bubbling. Serve and enjoy!
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Recipe Notes
Here are a few helpful cook’s notes to make sure your casserole tastes amazing!
- Extra Topping: Splurge on another container of French fried onions and measure with your heart!
- Canned Green Beans: Frozen green beans will keep their texture much better than canned, but you can definitely use canned green beans instead. Use 6 cans of drained green beans in place of frozen green beans.
- Skip The Cheese: Not a fan of cheese in your green bean casserole? No worries, just skip it! This crock pot green bean casserole recipe will work perfectly without it!
- No Mushrooms: Substitute cream of celery soup, or even a can of cream of chicken soup, if you aren’t a fan of mushrooms.
- More Mushrooms: Want to add extra mushrooms? Add 1 cup of sliced portobello mushrooms when you add the green beans.
- Keep It Crispy: Place a paper towel (or a thin tea towel) over the top of the crockpot and then place the lid on top. This will catch any falling condensation and keep the top crispy!
What to Serve with Crock Pot Green Bean Casserole
This dish perfectly compliments all of your favorite holiday recipes. Here are just a few of ours:
- Turkey Breast: If you love the traditional Thanksgiving turkey but don’t want to make a whole bird, try making an air fryer turkey breast.
- Corn Casserole: Anything with corn is a hit around here – but this corn casserole is extra-special old-fashioned recipe and super easy.
- Cranberry Relish: Real cranberry sauce is easy to make and adds a refreshing contrast to savory holiday dishes. This delectable cranberry relish recipe is one you’re sure to love!
- Potatoes: Try the best garlic mashed potatoes, easy cheesy potato casserole, or my personal favorite sweet potato casserole.
Storing and Reheating Instructions
Storing this casserole is easy. Just scoop or spoon casserole in an airtight container and store in the fridge for up to 3 days.
Reheat in a microwave-safe dish, cover with a paper towel, and microwave to desired temperature. You can also reheat in the oven at 350°F until heated through.
Can I Freeze This Slow Cooker Green Bean Casserole?
Crockpot green bean casserole will freeze well, but beware, the French fried onion topping will lose its crunch after thawing. It’s still perfectly safe to eat. Portion out the leftovers into freezer containers and freeze for 3 months.
More Easy Holiday Sides
- The Best Homemade Stuffing Recipe
- Copycat Texas Roadhouse Rolls
- Homemade Fried Apples
- Baked Mac and Cheese
Crockpot Green Bean Casserole
Ingredients
- 2 (10.5 oz) cans cream of mushroom soup
- ½ cup whole milk
- ¼ cup low-sodium soy sauce
- ½ teaspoon freshly ground black pepper
- 2 cups French fried onions, divided
- 1 cup freshly grated parmesan cheese, divided
- ½ cup freshly grated cheddar cheese
- 3 (10 oz) bags whole frozen green beans, ends cut off
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Instructions
- Add the mushroom soup, milk, soy sauce, and pepper to your slow cooker and stir to combine. Then stir in half of the crispy fried onions, half of the parmesan cheese, and all of the cheddar cheese.
- Stir in the frozen green beans. Then sprinkle the remaining parmesan cheese on top, followed by the remaining crispy fried onions.
- Cover with the lid, and cook on low for 3 hours, or on high for 2 hours, until the onions are golden brown and the edges are bubbling.
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I never thought I would find an improvement on the traditional green bean casserole, but this is fantastic! Thank you!
Hello! Is cooking time the same doubling the recipe? Or what do you recommend?
Hi Jenna! Yes the cooking time will be the same, just give them a good stir half way through!
What size of crockpot did you use?
A 6 quart, but a 7 or 8 quart will work just as well!
Looks amazing! How many people does it feed?
Hi Lily 6 hearty servings! (The recipe yield is always listed in the recipe card right above the recipe name.)
Sounds delicious!!! Can the recipe be doubled???
Hi Debbie! Yes, you can, but you will likely need a larger crockpot if using fresh green beans. The fresh green beans take up more space and cook down a decent amount, so you would need either two crockpots or one very large crockpot.
Can you use fresh green beans?
Thank you!!! BTW…what size crockpot did you use???
Yes, but I’d recommend pre-cooking them a little so they cook in time in the crockpot. You could steam them, roast them or saute them for a few minutes before adding them to the crockpot.