If you’re looking for an easy, no-fuss dish that delivers both flavor and convenience, this Crockpot Green Bean Casserole recipe is perfect for you. Traditionally baked in the oven, this creamy, savory casserole can be made in the crockpot with minimal effort, making it an ideal side dish for busy weeknights, family gatherings, or holiday dinners. With the help of a slow cooker, you can focus on other tasks while this delicious dish cooks itself to perfection. Read on to discover everything you need to know about making a delicious crockpot green bean casserole, from ingredient lists to common mistakes to avoid.

What Is Crockpot Green Bean Casserole?
Crockpot green bean casserole is a twist on the classic green bean casserole recipe. It involves slow-cooking green beans in a rich, creamy sauce made from cream of mushroom soup and milk, with a crunchy topping of fried onions. The traditional version is often baked in the oven, but the crockpot version simplifies the process, allowing the dish to cook slowly and infuse all the flavors. It’s a fantastic side dish for Thanksgiving, Christmas, or any cozy family meal, and is known for its creamy texture, savory taste, and ease of preparation.
Ingredients List for Crockpot Green Bean Casserole
Here’s a basic list of ingredients you’ll need to create a delicious crockpot green bean casserole:
Main Ingredients:
- 2 cans (10.5 oz each) cream of mushroom soup
- 1 cup milk (whole or 2% for richness)
- 4 cans (14.5 oz each) green beans (drained, or about 6 cups of fresh green beans, trimmed and blanched)
- 1 ½ cups French’s crispy fried onions
- 1 teaspoon soy sauce (optional, for added umami)
- ½ teaspoon ground black pepper
- ½ teaspoon garlic powder (optional)
Optional Ingredients:
- 1 cup shredded cheddar cheese (for extra creaminess)
- ¼ cup sour cream (for added richness)
- ¼ teaspoon ground nutmeg (for a subtle warmth)
- Bacon crumbles (for a smoky addition)
Ingredients List for Crockpot Green Bean Casserole (Expanded)
For a bit of variation and to elevate the flavors of the casserole, consider adding the following:
- Fresh Mushrooms: Instead of using only cream of mushroom soup, sauté 1 cup of fresh mushrooms and add them to the casserole for more texture and a robust mushroom flavor.
- Fresh Green Beans: If you prefer fresh over canned, substitute canned beans with 6 cups of fresh green beans. Blanch the beans first by boiling them for 3-4 minutes and then transferring them to ice water to maintain their bright color and crispness.
- Heavy Cream: For an ultra-creamy texture, replace half the milk with heavy cream.
- Shallots or Onions: Finely chopped and sautéed onions or shallots add a slightly sweet and complex flavor to the casserole.
Substitutions and Variations
Green bean casserole is highly customizable, making it easy to adjust the recipe to your liking or dietary needs. Here are a few ideas:
- Fresh vs. Canned Green Beans: While canned green beans are more convenient, fresh or frozen green beans can provide a crisper texture and fresher taste. If using frozen, thaw and drain them before cooking.
- Cream of Chicken Soup: If you’re not a fan of cream of mushroom soup or don’t have it on hand, you can swap it out for cream of chicken soup. For a vegetarian option, use cream of celery or a dairy-free version of cream soup.
- Gluten-Free Version: Use gluten-free fried onions and a gluten-free cream of mushroom soup to make this dish gluten-free.
- Vegan Version: For a vegan green bean casserole, use a plant-based cream of mushroom soup, almond or soy milk, and dairy-free fried onions. You can also add nutritional yeast for a cheesy flavor.
- Cheesy Twist: Add shredded cheddar or mozzarella cheese to the casserole mixture for an extra cheesy, gooey texture.
- Spicy Version: Add ½ teaspoon of cayenne pepper or a dash of hot sauce to the sauce for a spicy kick.
Step-by-Step Cooking Instructions

Follow these step-by-step instructions to prepare the perfect crockpot green bean casserole.
- Prepare the Green Beans: If you’re using fresh green beans, trim the ends and cut them into bite-sized pieces. Blanch the green beans in boiling water for 3-4 minutes, then immediately plunge them into ice water to stop the cooking process. Drain well.
- Mix the Sauce: In a large bowl, combine the cream of mushroom soup, milk, soy sauce (if using), pepper, and garlic powder. Stir until the ingredients are fully incorporated.
- Layer the Crockpot: Spray your crockpot with non-stick cooking spray. Add half of the green beans to the crockpot, then pour half of the soup mixture over them. Add a layer of fried onions (about ½ cup). Repeat with the remaining green beans and soup mixture.
- Slow Cook: Cover the crockpot and cook on low for 4-5 hours or on high for 2-3 hours. Stir the mixture halfway through cooking to ensure even distribution of the sauce.
- Add the Crispy Topping: About 30 minutes before the casserole is done, sprinkle the remaining crispy fried onions over the top. Cover the crockpot and continue cooking until the onions are golden brown and the casserole is heated through.
- Serve: Once the casserole is done, serve hot as a side dish to your main course.
How to Cook Crockpot Green Bean Casserole: A Step-by-Step Guide
- Set Up the Crockpot: Begin by spraying your crockpot with a non-stick spray to prevent sticking and make clean-up easier.
- Layer Ingredients for Optimal Texture: Layering the green beans, soup, and fried onions ensures that each bite has the perfect combination of creaminess and crunch.
- Slow Cook for the Best Flavor: Slow cooking allows the green beans to absorb the creamy sauce and meld with the flavors of the mushroom soup and seasonings.
- Crispy Topping at the Right Time: Add the fried onions at the end of the cooking time to keep them crispy. If you add them too early, they may become soggy.
Common Mistakes to Avoid
- Not Draining Canned Green Beans: Always drain and rinse canned green beans before adding them to the crockpot. Otherwise, your casserole may turn out too watery.
- Overcooking the Green Beans: If you cook the green beans too long, especially fresh ones, they may become mushy. Stick to the cooking times provided for the best texture.
- Adding the Fried Onions Too Early: Adding the fried onions too early in the cooking process can result in a soggy topping. For the best results, add them in the last 30 minutes of cooking.
Serving and Presentation Tips
Crockpot green bean casserole may be a comfort dish, but that doesn’t mean you can’t make it look appealing on the table. Here are some tips for serving and presenting your casserole:
How to Serve Crockpot Green Bean Casserole
- Family Style: Serve the casserole directly from the crockpot for a cozy, family-style presentation. Use a large serving spoon to allow guests to scoop their desired portions.
- Individual Servings: For a more formal dinner, scoop individual portions of the casserole onto plates next to the main course, such as roasted turkey, ham, or chicken.
- Holiday Side Dish: This casserole is an excellent side for Thanksgiving or Christmas, pairing beautifully with traditional holiday dishes.
Presentation Ideas for Crockpot Green Bean Casserole
- Garnish with Fresh Herbs: A sprinkle of fresh parsley or thyme adds a bright pop of color and a hint of freshness to the dish.
- Use a Decorative Serving Dish: If you prefer, you can transfer the casserole from the crockpot to a decorative serving dish before adding the fried onions. This adds a polished look for special occasions.
- Add a Cheese Topping: A layer of melted cheddar or Parmesan cheese on top of the casserole can add an appealing golden color and extra flavor.
Crockpot Green Bean Casserole Recipe Tips
- Adjust the Cooking Time: If your crockpot runs hotter than average, check the casserole a bit earlier than the suggested cooking time to avoid overcooking the green beans.
- Make It Creamier: For a richer texture, substitute half of the milk with heavy cream or stir in ¼ cup of sour cream.
- Make It Ahead: You can assemble the casserole ingredients (except the fried onions) up to 24 hours in advance. Store it in the fridge and simply transfer to the crockpot when ready to cook.
Frequently Asked Questions (FAQs)
Can I make this casserole ahead of time?
Yes! You can prepare the casserole in advance by assembling all the ingredients in the crockpot (except the fried onions) and storing it in the refrigerator for up to 24 hours. Cook it according to the instructions when you're ready.
Can I freeze green bean casserole?
Yes, you can freeze green bean casserole, but it may lose some of its texture. To freeze, allow the casserole to cool completely, then transfer it to an airtight container. Freeze for up to 2 months and reheat in the oven or microwave.
Can I use fresh green beans instead of canned?
Absolutely! Fresh green beans are a great option for a crisper texture. Just blanch them first to ensure they cook evenly in the crockpot.
Conclusion
This Crockpot Green Bean Casserole recipe is a comforting and easy-to-make dish that’s perfect for holidays, potlucks, or weeknight dinners. With a creamy mushroom sauce, tender green beans, and a crunchy fried onion topping, this dish is sure to be a hit with family and friends. The crockpot method allows for hands-off cooking, giving you more time to focus on other tasks or dishes. Follow the tips and variations provided to make the casserole your own, and enjoy the rich, savory flavors of this classic side dish!
PrintCrockpot Green Bean Casserole Recipe
This Crockpot Green Bean Casserole recipe is the perfect make-ahead side dish, combining tender green beans, creamy mushroom soup, and crispy fried onions. Ideal for holiday meals or simple family dinners, this slow-cooked dish is packed with flavor and is a fuss-free way to prepare a classic comfort food. Perfect for busy schedules, this casserole offers all the traditional flavors with minimal effort!
- Prep Time: 10 minutes
- Cook Time: 4 hours (on low)
- Total Time: 4 hours 10 minutes
- Yield: 6 servings 1x
- Category: Side Dish
- Method: Slow Cooker
- Cuisine: American
- Diet: Vegetarian
Ingredients
- 4 cups fresh or frozen green beans, trimmed
- 2 cans (10.5 oz each) condensed cream of mushroom soup
- 1 cup milk
- 1 tsp soy sauce
- ½ tsp black pepper
- 1 ½ cups fried onions, divided
- 1 cup shredded cheddar cheese (optional)
Instructions
- In a mixing bowl, combine cream of mushroom soup, milk, soy sauce, and black pepper.
- Add green beans and 1 cup of fried onions to the mixture, and stir to combine.
- Transfer the mixture to the crockpot and cook on low for 4-5 hours, or on high for 2-3 hours, until the green beans are tender.
- About 30 minutes before serving, stir in cheddar cheese (optional).
- Before serving, sprinkle the remaining ½ cup of fried onions on top. Serve warm.
Notes
- For extra crispiness, toast the fried onions in the oven for a few minutes before adding them on top.
- You can use canned green beans for a softer texture, reducing cook time slightly.
Nutrition
- Serving Size: 1 serving
- Calories: 210
- Sugar: 3g
- Sodium: 600mg
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