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Slow Cooker Green Bean Casserole

Slow Cooker Green Bean Casserole

An easy slow cooker green bean casserole made with a creamy parmesan mushroom sauce and crispy French fried onions. No oven needed, so it’s perfect for holidays and potlucks.

  • Author Alison Wood
  • Prep Time 10 mins
  • Cook Time 3 hrs
  • Total Time 3 hrs 10 mins
  • Yield 810 servings 1x
  • Category Side Dish, Sides
  • Method Slow Cooking
  • Cuisine American

Ingredients

Scale
  • 32 oz frozen whole green beans, thawed
  • 2 (10.5 oz) cans cream of mushroom soup
  • ¾ cup half-and-half
  • ½ cup shredded parmesan cheese
  • 3 garlic cloves, minced
  • ½ tsp salt
  • ½ tsp black pepper
  • 6 oz French fried onions, divided

Instructions

  1. Add thawed green beans to slow cooker.
  2. Combine the cream of mushroom soup, half-and-half, parmesan cheese, garlic, seasonings, and just half of the fried onions. Stir well and add the mixture into the slow cooker on top of the green beans.
  3. Fold everything together until the green beans are coated. Spread it all out into an even layer in the slow cooker.
  4. Place lid on top and cook on the low setting for 3–4 hours or the high setting for 2 hours, until green beans are tender.
  5. Stir the casserole well. Sprinkle the remaining fried onions. Serve immediately.

Notes

  • Canned green beans can be used, however the results will be much softer.
  • If you don’t want cream of mushroom, swap it for canned cream of chicken or cream of celery.
  • For a thinner cream sauce, swap to whole milk.
  • Instead of parmesan, you can use shredded cheddar.
  • Serve immediately. The sauce reduces the longer it sits.
  • Add chopped bacon, shredded chicken, or shredded turkey to make it more filling.
  • Sliced mushrooms can also be added.
  • Be mindful of how much extra meat or vegetables you add; you may need more cream sauce to coat everything.