Homemade green bean casserole is the most famous side dish to grace a holiday table.

It is no wonder that this classic green bean casserole recipe has been around for such a long time. It is a delicious side dish and an easy recipe with only a few ingredients. Plus, everyone loves it.

I can still remember the first time my mother made green bean casserole. We were hooked and she served it every year at Thanksgiving.

Holiday dinners mean a busy and crowded oven. Take out your Crockpot and free up some oven space. I have included the full recipe for the Crockpot and Oven versions of this classic Thanksgiving side dish below.

I also make my Crockpot Brown Sugar and Pineapple Glazed Ham to save oven space for big family dinners. Another delicious side dish you can make in a slow cooker is this one for Macaroni and Cheese.

This article contains affiliate links. Please see our Disclosure Policy.

Ingredients List

• 3 cans (14.5 oz each) cut green beans, drained
• 2 cans (10.5 oz each) cream of mushroom soup
• ½ cup milk, whole or 2%
• ¼ teaspoon salt
• ¼ teaspoon black pepper
• ¼ teaspoon onion powder
• 1 can (6 oz) french-fried onions 

How to Make Green Bean Casserole in the Crockpot

Step 1 Prepare the Crockpot

Line the Crockpot with disposable Crockpot Liners or spray with nonstick cooking spray.

Step 2

Drain all of the juice from the green beans and add the beans to the slow cooker.

Step 3

In a medium-sized bowl, add the canned cream of mushroom soup, milk, and seasonings. Whisk together until the mixture is pretty smooth. The mushrooms will keep it from being completely smooth. Then pour over the green beans in the Crockpot and gently mix with the green beans.

Try my delicious Pork Chop Casserole recipe that also uses cream of mushroom soup.

Step 4

Using a spatula, fold about half of the french fried onions into the green bean mixture.

Step 5

Place the lid onto the Crockpot and cook for about 2-3 hours on low or about one hour on high.

Step 6

Remove the lid and sprinkle the remaining crispy fried onions on top of the delicious green bean casserole. Leave the lid off the Crockpot and serve.

One of the benefits of making an easy green bean casserole recipe in the Crockpot is being able to get started cooking ahead of time. Plus it frees up oven space for other favorite side dishes like my delicious Carrot Souffle.

Directions for making Green Bean Casserole in the Oven

Step 1

Preheat the oven to 350°. Prepare your casserole dish by spraying the inside with nonstick cooking spray.

Step 2

Drain all of the green beans and spread them into the casserole dish in an even layer.

Step 3

In a medium-sized bowl, add the canned cream of mushroom soup, milk, and seasonings. Whisk together until the mixture is pretty smooth. Now fold in about half of the french fried onions. Then pour over the green beans and gently mix with a spatula so that all of the green beans get hugged with the creamy soup mixture.

Step 4

Place your baking dish, uncovered into your preheated oven and bake for about 25 minutes. Remove from the oven and sprinkle the remaining onions on top then return to the oven for about 5 minutes. Those crispy onions on top are just about the star of the show.

Serve and enjoy.

In my family’s opinion, this is the very best green bean casserole recipe you can find. It is simple, easy, and delicious making it the perfect side dish for Thanksgiving when we bring out the best. Your Thanksgiving table won’t be complete without it.

How to store leftover green bean casserole

Store any leftovers in an airtight container in the refrigerator for a couple of days. Can be reheated in the microwave.

Can you mix up green bean casserole the night before?

Yes, but do it like this. In a medium-sized bowl, add the canned cream of mushroom soup, milk, and seasonings. Whisk together until the mixture is pretty smooth. Add the drained green beans and fold well. Cover with plastic wrap and store in the refrigerator overnight until ready to use the next day. Then follow the remaining instructions. Do not add any of the french-fried onions until ready to cook.

My Green Bean Casserole recipe is an easy classic Thanksgiving side dish that can be made in the Crockpot or oven. Green beans hugged with a flavorful creamy mushroom sauce heated to perfection and topped with crispy fried onions.

Optional Ingredients for Green Bean Casserole

Crumbled cooked bacon can be added to the fried onion topping.

Sauteed fresh mushrooms or minced garlic can be included in the creamy of mushroom soup mixture.

The Campbell’s green bean casserole recipe has a teaspoon of soy sauce added in with the mushroom soup mixture. If you are a fan of soy sauce, go for it.

You can use fresh or frozen green beans, as long as you cook them first. Blanch fresh green beans until tender prior to use. Cook frozen green beans according to package directions before using them in the casserole recipe.

Substitute bread crumbs and parmesan cheese for the french fried onions topping if you like.

More Thanksgiving Recipes and Ideas

The Best Homemade Mashed Potatoes recipe. TIP: Keep your mashed potatoes warm by adding them to a slow cooker turned down to the lowest setting.

Best Ever Southern Candied Yams recipe that is worth the extra trouble.

How To Make Thanksgiving Clean Up Easier. Tips you need to know if you are hosting Thanksgiving dinner at your house.

Southern Cornbread Dressing recipe made just like Momma taught me. Video included.

A Gold and Green Thanksgiving Table with Natural decorations included. Set a pretty table for Thanksgiving with any of these ideas.

Make this fun Turkey Cheeseball for a Thanksgiving appetizer.

More Side Dish Recipes

• Italian Roasted Cauliflower Steaks recipe
• Classic Creamy Potato Salad Recipe
• Homemade Creamy Cole Slaw Recipe
• Basil Grilled Tomatoes recipe
• Roasted Brussel Sprouts with Balsamic Glaze
• How To Make Southern Deviled Eggs
• Crockpot Macaroni & Cheese Recipe

Thank you for sharing!