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Air Fryer Green Bean Casserole With Crispy Fried Onions – Holiday Side Dish Recipe

Air fryer green bean casserole with crispy fried onions combines green beans, creamy mushroom soup, and a savory sauce in a compact baking dish. Air fry until bubbling, then finish with a golden, crunchy onion topping.
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Prep Time 10 minutes
Cook Time 23 minutes
Resting 5 minutes
Total Time 38 minutes
Servings: 6 servings
Course: Side Dish
Cuisine: American
Calories: 215
Ingredients Equipment Method Notes

Ingredients
  

For the casserole
  • 1 cooking spray nonstick
  • 2 can (14.5 oz) green beans cut, drained and rinsed
  • 1 can (10.5 oz) cream of mushroom soup condensed
  • 0.5 cup milk
  • 1 tsp soy sauce
  • 0.25 tsp ground black pepper
For the topping
  • 1.5 cup crispy fried onions divided

Equipment

  • 1 6-quart air fryer
  • 1 7-inch round, 1 1/2-quart oven-safe baking dish

Method
 

Make the casserole
  1. Preheat a 6-quart air fryer to 350°F for 3 minutes.
  2. Lightly coat a 7-inch round, 1 1/2-quart oven-safe baking dish that fits in the air fryer basket with cooking spray.
  3. In a medium bowl, stir together the green beans, cream of mushroom soup, milk, soy sauce, black pepper, and 1/2 cup of the crispy fried onions.
  4. Spread the mixture in the prepared dish.
  5. Air fry at 350°F for 15–18 minutes, until hot and bubbling in the center.
Add the topping
  1. Scatter the remaining 1 cup crispy fried onions evenly over the casserole.
  2. Air fry for 2–4 minutes, until golden brown.
  3. Rest the casserole for 5 minutes before serving.

Notes

For an even crispier topping, add the onions only for the final 2–4 minutes. Refrigerate leftovers in an airtight container for up to 3 days; freezing is not recommended because the creamy sauce can separate. Use unsweetened dairy-free milk if needed.