Tender green beans and savory mushrooms in a cheesy sauce topped with crispy fried onions make this delicious Green Bean Casserole unforgettable!
I sure do love turkey at Thanksgiving, but give me ALL the side dishes, including a huge helping of this casserole!
This is a delicious spin on a familiar classic using frozen green beans, onions, fresh mushrooms, cream of mushroom soup, garlic, heavy cream, Parmesan cheese, and of course – French fried onions!
I love it because it’s simple to prepare and it’s not the “same ole” recipe everyone’s used to. It’s a must-have staple side dish at your holiday table!
- Green beans – frozen green beans that have been thawed and patted dry with a paper towel.
- Mushrooms – I used white mushrooms, but baby bella are delicious as well!
- French fried onions
- Butter – I use unsalted so that I can control the salt, but feel free to use salted.
- Cream of mushroom soup – cream of chicken or cream of celery soup can also be used.
- Parmesan cheese – I’ve also prepared this with cheddar cheese and it’s delicious as well!
- Salt and black pepper – feel free to adjust the amounts to your liking.
- Heavy cream – do not substitute with milk; you will need heavy cream in this recipe to thicken the sauce.
How to Make it
Following is a brief overview – please see the recipe card for ingredient amounts and full detailed instructions.
- Cook onions, mushrooms and garlic in butter in a large skillet.
- Add soup and heavy cream. Stir to combine and bring to a simmer.
- Add cheese, salt and pepper. Stir until cheese is melted.
- Add green beans and 1/2 cup of the French fried onions. Stir to coat.
- Transfer to a prepared baking dish and spread evenly.
- Bake for 25 minutes.
- Remove from oven and sprinkle with remaining French fried onions. Bake for an additional 5 minutes, or until onions are golden brown.
It’s sure to be a hit!
Prepare casserole but do NOT top with onions. Cover baking dish tightly with foil and refrigerate for up to 2 days. Remove from refrigerator 30 to 40 minutes before ready to bake and allow to come close to room temperature. Bake as directed.
More Holiday Side Dishes
Green Bean Casserole
- 2 tablespoons butter unsalted
- ½ cup chopped yellow onion
- 2 cups sliced fresh mushrooms white or baby bella
- 1 tablespoon minced fresh garlic
- 1 (10.5 ounce) can condensed cream of mushroom soup or cream of chicken or celery
- 1 cup heavy cream
- 1 cup finely shredded Parmesan cheese or cheddar
- ½ teaspoon salt more or less, to taste
- ½ teaspoon black pepper more or less, to taste
- 1 (16 ounce) bag frozen cut green beans thawed and patted dry
- 2 cups French fried onions divided
- Preheat your oven to 350 degrees F. Spray a 2 quart baking dish with cooking spray. Set aside.
- Melt butter in a large skillet over medium heat. Add onions and cook for 2 minutes, stirring often. Add mushrooms and cook until softened, stirring often (about 3 to 4 minutes). Add garlic and cook for 30 seconds, while stirring.
- Add soup and heavy cream. Stir to combine. Bring to a simmer, then add cheese, salt and pepper. Stir until cheese is melted.
- Add green beans and ½ cup of the French fried onions. Gently stir to coat as evenly as possible.
- Transfer to prepared baking dish and spread evenly.
- Bake (uncovered) for 25 minutes. Using oven mitts, carefully remove from oven and sprinkle evenly with the remaining 1 ½ cups of the French fried onions. Return to oven and bake for an additional 5 minutes, or until onions are golden brown.
- Let stand for 10 minutes before serving (sauce will thicken as it cools).
- To make-ahead: Prepare casserole but do NOT top with fried onions. Cover baking dish tightly with aluminum foil and refrigerate for up to 2 days. Remove from fridge 30 to 40 minutes before ready to bake and allow to come close to room temperature. Bake as directed.
If provided, nutritional info is a courtesy, is not guaranteed and should only be considered as a guideline.
Originally published November 2015. Updated with new photos, new text and recipe revised November 2021.
Recipe inspired by Food Network