Slow Cooker Green Bean Casserole: A Comforting Classic Made Easy

Slow cooker green bean casserole is a beloved dish that combines tender green beans, creamy mushroom sauce, and crispy fried onions for a comforting and flavorful side dish. This recipe simplifies the cooking process by utilizing the convenience of a slow cooker, allowing you to prepare this classic casserole with minimal effort. Whether you’re hosting a holiday dinner or simply craving a delicious and satisfying dish, this slow cooker green bean casserole is sure to become a favorite in your recipe collection.

Preparation Time:

  • Prep time: 10 minutes
  • Cook time: 4-6 hours
  • Total time: 4-6 hours 10 minutes


  • 2 pounds (about 900g) fresh green beans, trimmed and cut into bite-sized pieces
  • 1 can (10.5 ounces/298g) condensed cream of mushroom soup
  • 1 cup (240ml) chicken or vegetable broth
  • 1 cup (240ml) milk (whole or 2%)
  • 1 teaspoon garlic powder
  • 1/2 teaspoon onion powder
  • Salt and pepper, to taste
  • 1 1/2 cups (150g) French fried onions, divided


1. Prepare the Slow Cooker:

  • Lightly grease the insert of your slow cooker with cooking spray or oil to prevent sticking.

2. Combine Ingredients:

  • In the prepared slow cooker, combine the trimmed and cut green beans, condensed cream of mushroom soup, chicken or vegetable broth, milk, garlic powder, onion powder, salt, and pepper. Stir until well combined.

3. Cook:

  • Cover the slow cooker with the lid and cook the green bean mixture on low heat for 4-6 hours, or until the green beans are tender and cooked to your desired consistency.

4. Add Fried Onions:

  • About 30 minutes before serving, stir in 1 cup of the French fried onions into the slow cooker, reserving the remaining 1/2 cup for garnish.

5. Serve:

  • Once the green bean casserole is cooked and heated through, transfer it to a serving dish.
  • Sprinkle the remaining 1/2 cup of French fried onions on top of the casserole as a garnish.
  • Serve hot and enjoy!

Cooking Tips:

  • For a creamier sauce, you can use half-and-half or heavy cream instead of milk.
  • If you prefer a thicker sauce, you can add a cornstarch slurry (1 tablespoon cornstarch mixed with 1 tablespoon cold water) during the last hour of cooking.
  • To add extra flavor, you can sauté diced onions and sliced mushrooms before adding them to the slow cooker.
  • For a crunchy topping, you can toast slivered almonds or breadcrumbs and sprinkle them over the casserole along with the fried onions.

Why You’ll Love This Recipe:

  • Easy Preparation: This slow cooker green bean casserole requires minimal prep work, making it a convenient and stress-free side dish for any occasion.
  • Classic Comfort Food: With its creamy mushroom sauce and crispy fried onions, this casserole is a nostalgic and comforting dish that’s sure to please everyone at the table.
  • Perfect for Potlucks: This recipe is perfect for potlucks, holiday gatherings, or any time you need to feed a crowd without spending hours in the kitchen.


Slow cooker green bean casserole is a delicious and convenient side dish that’s perfect for any occasion. With its tender green beans, creamy mushroom sauce, and crispy fried onions, this casserole is sure to become a favorite among family and friends. Whip up a batch today and enjoy the comforting flavors of this classic dish with minimal effort and maximum flavor!

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