This easy Crockpot Green Bean Casserole is a holiday lifesaver— it frees up oven space and comes together in minutes. With just six main ingredients, it makes a creamy, flavorful side that’s perfect for busy holiday meals.
Slow cooker side dishes are ideal for holiday entertaining because they’re convenient and hands-off.
This green bean casserole is creamy and savory with a pleasant crunch from the fried onions. It pairs beautifully with roast turkey, slow-cooked ham, mashed potatoes, stuffing, or a tart cranberry sauce. Whether you serve it for Thanksgiving or any family dinner, it’s a classic that many households return to year after year.
If you’re juggling multiple dishes, the slow cooker version helps you stay organized and stress-free.
Why This Recipe Is Worth Making
- Quick and Easy: This casserole is dump-and-go—minimal prep and little hands-on time.
- Oven Space Saver: Made in the slow cooker, it frees your oven for pies, roasts, or other hot dishes.
- Feeds a Crowd: The recipe scales well and is great for family gatherings.
Ingredient Notes
- Green Beans: Canned green beans are convenient and work well here, but fresh or frozen can be used—adjust cooking slightly for fresh beans.
- Condensed Soup: Classic cream of mushroom gives traditional flavor. You can substitute cream of chicken or cream of celery if preferred.
- Milk: Whole milk makes a richer sauce; use lower-fat milk if needed.
- Worcestershire Sauce: Adds savory depth; soy sauce is an acceptable substitute.
- Spices: Onion powder and garlic powder keep the flavor simple and reliable. Season with salt and pepper to taste.
- French Fried Onions: These give the signature crunchy topping—reserve half to add at the end so they stay crisp.
The complete recipe and printable card are included below.
Variations & Substitutions
- Fresh or Frozen Beans: Use about 2 pounds of fresh or frozen beans. Trim and halve fresh beans; blanch briefly and shock in ice water to preserve color if desired.
- Cheesy Version: Stir in 1 cup shredded cheddar or ½ cup grated Parmesan for extra richness.
- Different Soup: Cream of chicken or cream of celery work well if you prefer no mushroom flavor.
- Bacon: Fold in cooked, crumbled bacon for a smoky note.
- Sautéed Mushrooms: Add sautéed mushrooms to intensify mushroom flavor if using cream of mushroom soup.
Step-By-Step Instructions
1. Prepare the Beans: Drain the canned green beans and place them in the slow cooker.
2. Mix the Sauce: In a medium bowl, whisk together the condensed cream of mushroom soup, milk, Worcestershire sauce, garlic powder, onion powder, half of the French-fried onions, salt (if desired), and black pepper. Pour the mixture over the green beans and gently stir to coat.
PRO TIP: Stir in shredded cheese now if you want a richer sauce.
3. Cook: Cover and cook on LOW for about 4 hours, until bubbly and heated through (or HIGH for 2–3 hours).
4. Add Topping: Just before serving, sprinkle the remaining French-fried onions over the casserole to preserve their crunch. Serve warm.
PRO TIP: For an extra-crispy top, transfer the slow cooker insert to the oven and broil briefly if the insert is oven-safe.
Enjoy a simple, crowd-pleasing green bean casserole that’s perfect for holiday tables or weeknight meals.
Expert Tips
- Equipment: A 6-quart slow cooker works well for this recipe; a 4-quart will work for smaller portions. Cooking times may vary by model.
- Add Toppings Late: To keep fried onions crispy, add most of them at the end of cooking.
- Serve Promptly: The casserole is best served right after cooking to maintain texture, though the slow cooker can keep it warm during the meal.
- Make-Ahead: Combine everything except the onion topping and refrigerate. When ready, transfer to the slow cooker and cook as directed.
- Serving: Serve straight from the slow cooker or transfer to a casserole dish for the table.
Storing & Reheating
Refrigerator: Store leftovers in an airtight container for 4–5 days. The fried onions will soften over time.
Reheating: Reheat in a 350°F oven to restore some crispness to the topping, or microwave briefly (topping will lose crispness in the microwave).
Recipe FAQs
The casserole should have a thick, creamy sauce that lightly coats the beans with a crispy fried-onion topping.
Stored in an airtight container, it keeps 4–5 days. Reheat in the oven to crisp the topping again.
Yes—you can freeze the assembled casserole without the topping for up to 3 months. Thaw before cooking and add the fried onions at the end when reheating.
More Crock Pot Side Dishes
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Crock Pot Green Bean Casserole
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Ingredients
- (3) 14.5 ounce cans green beans, drained
- (2) 10.5 ounce cans condensed cream of mushroom soup, or cream of chicken
- ½ cup milk, we like whole milk
- 2 teaspoons Worcestershire sauce
- ½ teaspoon onion powder
- 1 teaspoon garlic powder, you can sub fresh minced garlic
- ¼ teaspoon black pepper
- 1¾ cup French fried onions, divided
Equipment
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6-quart Slow Cooker
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Spatula or cooking spoon
Instructions
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Prepare the Beans: Place drained green beans in the slow cooker.
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Mix the Sauce: In a bowl, whisk the condensed soup, milk, Worcestershire, garlic powder, onion powder, half the fried onions, salt (if using), and pepper. Pour over the beans and stir gently.
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Cook: Cover and cook on LOW for about 4 hours, until bubbly and heated through (or on HIGH for 2–3 hours).
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Add Topping: Just before serving, sprinkle the remaining fried onions on top and serve warm.
Notes
- Add Toppings at the End: To keep the fried onions crispy, add most of them just before serving.
- Serve Promptly: The casserole is best served right away for the best texture, though the slow cooker can keep it warm during the meal.
- Doubling: This recipe scales well and can fit in a 6-quart slow cooker when doubled.
- Make-Ahead: Mix everything except the topping and refrigerate until ready to cook.
- Storing: Store leftovers in an airtight container for 4–5 days.
Nutritional information is approximate and will vary based on brands and preparation.