If you’re looking for a set-it-and-forget-it side dish that’s perfect for the holidays—or honestly, any day—this Crockpot Green Bean Casserole checks all the boxes. It’s creamy, comforting, and topped with crispy French fried onions that take it over the top. The best part? You barely have to lift a finger to make it.

Crockpot Green Bean Casserole

This version is super simple, made with frozen green beans, cream of mushroom soup, and a few pantry staples that all get tossed right into your slow cooker. It’s ideal when you’ve already got your oven packed with holiday ham or cheesy potatoes. Want even more slow cooker side dish inspo? Try my instnat pot brown sugar carrots or crockpot mashed potatoes—they’re just as easy and crowd-pleasing.

This casserole is especially handy during the holidays when stovetop and oven space are at a premium. It frees you up to focus on your main dishes, and it still delivers that classic flavor everyone looks forward to. Bonus: it stays warm and creamy for hours on the “keep warm” setting!

What You Will Love About This Recipe

Easy prep – Just toss everything in and let the slow cooker do the work.

Perfect texture – Creamy and rich with that classic crunchy topping.

Great for holidays or potlucks – Travels well and stays warm.

Frees up oven space – Ideal for big meals or when your oven is full.

Classic comfort – That nostalgic flavor everyone expects on the table.

Ingredients

3 (12 ounces) packages frozen cut green beans
2 (10 ¾ ounce) cans condensed cream of mushroom soup
⅔ cup milk
½ cup grated Parmesan cheese
¼ teaspoon salt
¼ teaspoon black pepper
1 (6 ounces) package french fried onions, divided

How to make crockpot green bean casserole

Prepare the slow cooker liner with nonstick cooking spray.
Place all ingredients into the slow cooker EXCEPT about 1 cup of the french fried onions. Mix together until well combined.

Cover the slow cooker and cook on high for 5 to 6 hours. Top with remaining french fried onions prior to serving.

Tips & Tricks

Don’t skip the spray – Coat the slow cooker with nonstick spray to make cleanup a breeze.
Use French-style green beans if you prefer – Just adjust the cook time slightly.
Fresh or canned beans work too – Just drain and adjust liquid slightly if needed.
Add a little garlic powder – For an extra flavor boost.
Stir halfway through cooking – If you’re around, give it a quick mix to keep everything cooking evenly.

FAQs

Yes! Just make sure to drain them well. They may cook a bit quicker, so check on the texture earlier.

Totally! Mix everything together (except the topping) and refrigerate overnight. Cook the next day as directed.

Save about 1 cup of the French fried onions to sprinkle on top just before serving—don’t mix them in at the start or they’ll get soggy.

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Crockpot Green Bean Casserole

Name: Crockpot Green Bean Casserole
Prep time: 5 min
Cook time: 5 h
Total time: 5 h 5 min
Ingredients: 3 (12 ounces) packages frozen cut green beans; 2 (10 ¾ ounce) cans condensed cream of mushroom soup; ⅔ cup milk; ½ cup grated Parmesan cheese; ¼ teaspoon salt; ¼ teaspoon black pepper; 1 (6 ounces) package french fried onions, divided

Prep Time: 5 minutes

Cook Time: 5 hours

Total Time: 5 hours 5 minutes

Crockpot green bean casserole combines green beans, mushroom soup, milk, cheese, and french fried onion to create the classic holiday side dish right in your slow cooker. You will love this new way to create this classic dish everyone loves!

Ingredients

3 (12 ounces) packages frozen cut green beans
2 (10 ¾ ounce) cans condensed cream of mushroom soup
⅔ cup milk
½ cup grated Parmesan cheese
¼ teaspoon salt
¼ teaspoon black pepper
1 (6 ounces) package french fried onions, divided

Instructions

Prepare the slow cooker liner with nonstick cooking spray.
Place all ingredients into the slow cooker EXCEPT about 1 cup of the french fried onions. Mix together until well combined.
Cover the slow cooker and cook on high for 5 to 6 hours. Top with remaining french fried onions prior to serving.

Nutrition Information:

Yield:

Serving Size:

1
Amount Per Serving: Calories: 114Total Fat: 6gSaturated Fat: 2gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 11mgSodium: 763mgCarbohydrates: 10gFiber: 1gSugar: 1gProtein: 5g

Melissa

I’m Melissa, the imaginative force behind Sparkles to Sprinkles, where creativity comes to life, and sprinkles of joy are scattered generously. Melissa is a proud Jersey girl who found love with a New York boy. As a mom to four wonderful boys and a few fur babies, her journey into the world of blogging began after making the life-changing decision to stay home and raise her children. Previously a dedicated workaholic, Melissa’s blog became her creative outlet and passion project. Inspired by her mother-in-law, a masterful cook renowned for her delicious home-cooked meals and legendary holiday feasts (think mouthwatering sausage stuffing), Melissa honed her culinary skills through a combination of family recipes and countless cooking classes. She often attended these classes with her son Michael, who shared her enthusiasm for cooking from a young age. Melissa’s love for learning extends beyond familiar cuisines, as she enjoys exploring international recipes in hands-on cooking classes. Her blog features a diverse array of recipes, showcasing her expertise with various kitchen appliances such as the Instant Pot, air fryer, Slow Cooker, Ninja Foodi, Instant Vortex Plus, and more. Join Melissa on her culinary adventures as she shares tried-and-true family favorites alongside exciting new discoveries!

Slow Cooker Green Bean Casserole That Practically Makes Itself