Crock Pot Green Bean Casserole

This Crock Pot Green Bean Casserole is a flavorful, fuss-free twist on the classic holiday side. Made in the slow cooker, it saves precious oven space without sacrificing comfort or crunch.

Grean been casserole on a white plate with a slow cooker in the background.

I’ve been making this easy Crock Pot green bean casserole for a few years now, and it's hands-down one of the easiest sides I’ve ever thrown together. You get that creamy mushroom base, plenty of Parmesan, and of course, those crispy fried onions everyone loves.

It’s always a hit at family dinners or holiday get-togethers, almost as much as our scalloped potatoes and ham. And the best part? It frees up the oven while everything else is baking.

If you enjoy easy meals featuring green beans, you’ll love this chicken, potatoes, and green beans too. It's a hearty, satisfying meal your family will love.

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Why You’ll Love This Recipe
Ingredients
Variations
How to Make Green Bean Casserole in the Crock Pot
Expert Tips
Storage Directions
Serving Suggestions
Recipe FAQs
More Delicious Hearty Side Dishes
Crock Pot Green Bean Casserole

Why You’ll Love This Recipe

Easy to Make: Just a few minutes of prep, and this green bean casserole in the crock-pot is ready to slow cook, making it easy to prepare alongside other favorites like slow cooker Brussels sprouts for a stress-free holiday meal.
Comfort Food Classic: A creamy, nostalgic side dish that feels right at home on any holiday table.
Saves Oven Space: This slow cooker green bean casserole frees up valuable oven space for mains and desserts.
Great for Potlucks: Travels well and stays warm in the slow cooker, making it perfect for sharing with friends and family.

Overhead look of Crockpot green bean casserole with a wooden spoon in it.

Ingredients

Canned Green Beans: The main ingredient adds fresh flavor and a bright pop of color. Be sure to drain well to avoid excess liquid.
Campbell's Cream of Mushroom Soup: Provides a creamy, hearty base with rich mushroom flavor that binds the casserole together.
Parmesan Cheese: Adds a salty, sharp bite that enhances the overall flavor and gives a subtle nutty note.
Worcestershire Sauce: Brings a touch of savory umami that complements the mushroom soup perfectly.
French's Original Crispy Fried Onions: Added inside and sprinkled on top, these give the casserole its signature crunchy texture and flavor that makes this green bean casserole in the slow cooker a crowd favorite.

See the recipe card below for exact ingredient amounts, nutritional information, and detailed instructions.

Variations

Add Extra Cheese: Sprinkle shredded cheddar, Swiss, or Gruyere cheese on top for a rich, gooey finish that takes this casserole to the next level. If you love cheesy recipes, you’ll want to try our creamy Crock Pot Velveeta dip.
Add Bacon or Ham: Stir in cooked, crumbled bacon or diced ham for a smoky twist that adds savory richness.
Switch Up the Soup: Swap the cream of mushroom soup for cream of chicken or a vegetarian option like cream of broccoli to change the flavor profile while keeping it creamy.
Spice it Up: Add a pinch of cayenne pepper or smoked paprika to the seasoning mix for a subtle kick. You could also top it with some diced jalapeno.

How to Make Green Bean Casserole in the Crock Pot

This green bean casserole crock pot recipe is so simple to prepare. With just a few easy steps, you’ll have a creamy, flavorful dish ready to serve while freeing up your oven for other favorites.

Step 1: Prepare the Green Beans and Onions. Drain the canned green beans and add them to the slow cooker along with half of the crispy fried onions. Gently stir to combine so the onions are evenly mixed with the beans.
Step 2: Mix the Sauce. Whisk together the cream of mushroom soup, milk, Parmesan cheese, Worcestershire sauce, salt, onion powder, and black pepper until smooth and well combined.
Step 3: Combine and Cook. Pour the sauce over the green beans and onions in the slow cooker. Stir gently to coat everything evenly. Cover and cook on high for about 2½ hours or on low for 4 to 5 hours.
Step 4: Add the Crunchy Topping. When the casserole is done cooking, sprinkle the remaining crispy fried onions on top. Let it sit for a few minutes to allow the onions to stay crisp, then serve with other flavorful sides like slow cooker stuffing.

Expert Tips

Drain Well: Make sure to drain the canned green beans thoroughly to prevent the casserole from becoming too watery.
Stir Gently: When mixing the sauce and beans, stir gently to avoid breaking the beans and keep the casserole looking nice.
Layer Onions Carefully: Adding half the crispy fried onions inside and saving the rest for the topping helps keep that signature crunch.
Cook Low and Slow: For the best texture, cook on low for 4 to 5 hours; cooking too fast on high can sometimes make the beans mushy.
Control the Texture: To tone down the creaminess, you can reduce the milk slightly without affecting the overall flavor.

Slow cooker green been casserole on a white plate with a slow cooker in the background and salt & pepper shakers.

Storage Directions

Storing: Let leftovers cool completely before transferring them to an airtight container. Store in the refrigerator for up to 4 days. This casserole can be frozen before or after cooking. If freezing after cooking, let it cool fully, then wrap it tightly or store it in a freezer-safe container. Freeze for up to 3 months.
Reheating: For the slow cooker, set to low and heat for 1–2 hours or until warmed through. If frozen, thaw in the fridge overnight before reheating. For the oven, reheat at 350°F for about 25 minutes if frozen (thawed overnight) or 15 minutes if refrigerated. For the microwave, heat in 30–60 second intervals until hot.
Freezer Meal: To freeze before cooking, assemble the casserole without the crispy onions and store it in a freezer-safe dish. When ready to cook, thaw it out, and then add to your slow cooker to cook as directed.

Serving Suggestions

This classic green bean casserole is a holiday must-have! Pair it with slow cooker garlic mashed potatoes and brown sugar pineapple ham for a complete festive spread.
Enjoy it with a hearty main for Sunday dinner, serve alongside slow cooker beef tips and gravy for a family meal everyone will love.
Make for potlucks, parties, or family gatherings. This dish travels well and is always a crowd-pleaser. Add it to a table with creamy mac and cheese for the ultimate comfort food.

Crockpot green bean casserole with a wooden spoon in it.

Recipe FAQs

Can I make Crock Pot green bean casserole in advance?

You can assemble it up to 2 days ahead and store it in the fridge, either in the slow cooker insert, providing it’s fridge-safe, or in another dish, then transfer it before cooking. If starting cold, add an extra 15–30 minutes to the cook time. You can also freeze it before baking. Thaw it fully in the fridge before you continue with cooking it.

Can I use frozen green beans instead of canned in this green bean casserole?

Frozen green beans work well in this recipe. Just be sure to thaw and drain them first to avoid adding extra moisture to the casserole.

How do I keep my green bean casserole from getting mushy?

To prevent a mushy texture, don’t overcook the casserole. Also, make sure to drain canned green beans well or thaw and pat dry frozen ones before using.

Can I use fresh green beans to make slow cooker green bean casserole?

Absolutely! You may need to extend the cooking time slightly when using fresh green beans depending on the texture you want your green beans to have.

More Delicious Hearty Side Dishes

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