Make this from scratch Fresh Green Bean Casserole with Onion Ring Topping this holiday season! Green beans tossed with a creamy homemade mushroom sauce is topped with crispy air-fried onion rings and baked until bubbling and delicious. Serves 6 to 8.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com #thanksgiving #sidedish #greenbean #casserole #fromscratch #homemade #onionring

As if you couldn’t guess, my favorite Thanksgiving side dish is and always will be, green bean casserole.

A few years ago I did make a homemade version. While it’s super delicious, I still wanted that crispy fried onion topping.

Let’s be real, it’s the reason why people love this casserole so much, amiright? SO after owning my air-fryer for a year now, it has easily become my favorite appliance. And it makes the perfect onion topping for my homemade green bean casserole.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

No can of cream of mushroom soup needed.

Just simple, fresh ingredients for the best green bean casserole deserving enough to grace your Thanksgiving table.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

To make this homemade Fresh Green Bean Casserole You Will Need:

  • fresh green beans
  • unsalted butter
  • shallot
  • sliced fresh mushrooms
  • cloves fresh garlic
  • all-purpose flour
  • half and half
  • freshly grated nutmeg
  • kosher salt
  • freshly ground black pepper
  • freshly grated Parmesan cheese
  • beer battered onion rings

If you don’t have an air-fryer you can still make this recipe. Either slice up a bunch of shallots and fry them in 1 tablespoon each butter and olive oil until crispy or buy the store-bought crispy fried onion topping. No judgement here.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

First prep the green beans by bringing a large pot of salted water to boil. Also, fill a large bowl with ice and set a mesh strainer or colander in the center and fill with water.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Trim and cut 1-1/2 pounds green beans in half. Once the water is boiling, add all of the green beans and simmer for 6 minutes or until bright green and just starting to become tender.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Transfer the green beans to the waiting colander in the ice bath. When they are cool to touch, remove the strainer holding the green beans and drain well. Set these off to the side for a moment.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Melt 2 tablespoons of butter in a large, deep-sided skillet over medium-low heat.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

To the butter, add 1 diced shallot with a pinch of kosher salt and sauté until tender, about 5 minutes.

What is better than the smell of butter and shallots sautéing?

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

To that, add in 8 ounces of sliced mushrooms. Stir and cook until just tender, about 5 to 8 minutes, before adding in the 2 small cloves of garlic that have been minced. Cook for 1 to 2 minutes.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

As far as what mushrooms to use, I’m using cremini mushrooms, but white button would work too.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Once the mushrooms are tender, add in the remaining 4 tablespoons of butter.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Measure and stir in 1/4 cup unbleached all-purpose flour, until absorbed. Cook the flour for 2 to 3 minutes, stirring occasionally.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Pour in the 2 cups of half & half and stir, over medium-high heat, until thickened.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Stir in 1/3 cup freshly grated parmesan cheese.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Season with 1 teaspoon kosher salt (more or less to taste), 1/2 teaspoon freshly ground black pepper and 1/8 teaspoon grated fresh nutmeg.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Lastly, toss the blanched green beans in the creamy mushroom sauce before pouring the green bean mixture into 9×9 (or 8×8 would suffice) baking dish that has been sprayed with olive oil spray.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Cover tightly with aluminum foil and bake on the middle rack of your preheated 350° for 20 minutes.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

This casserole will smell heavenly!

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Remove the foil and scatter the lightly battered onion rings over top. Continue baking for an additional 20-25 minutes or until the casserole is bubbling and the onion rings are crispy and a deeper golden color.

I’m not kidding you when I say this is the best green bean casserole.

It’s the perfect combination of creamy meets crispy and it’s so delicious! But most importantly it’s easy. Instructions for making it in advance included 🙂

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Enjoy! And if you give this Fresh Green Bean Casserole recipe a try, let me know! Snap a photo and tag me on twitter or instagram!

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com
Yield: 8 to 10 servings

Fresh Green Bean Casserole with Onion Ring Topping

Make this Fresh Green Bean Casserole with Onion Ring Topping from scratch this holiday season! Green beans tossed with a homemade mushroom sauce and topped with crispy air-fried onion rings!

Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour

Ingredients

  • 1-1/2 pounds green beans, rinsed, trimmed and cut into 1-1/2 to 2-inch pieces
  • 1 tablespoon sea salt
  • 6 tablespoons unsalted butter (divided)
  • 1 large shallot, diced (about 1/3 cup)
  • 8 ounces sliced cremini mushrooms
  • 1 to 2 small cloves fresh garlic, minced (about 3/4 teaspoon)
  • 1/4 cup unbleached all-purpose flour
  • 2 cups half & half
  • 1/3 cup freshly grated parmesan cheese
  • 1 teaspoon kosher salt, or to taste
  • 1/2 teaspoon freshly ground black pepper
  • 1/8 teaspoon grated fresh nutmeg
  • 1 recipe for air fryer beer battered onion rings (lightly battered version)

Instructions

  1. Preheat your oven to 350° and spray a 9 x 9 baking dish with olive oil spray. Fill a large bowl with ice water and place a colander inside.
  2. Fill a 12-inch, deep-sided skillet with water half way. Bring to a boil and stir in 1 tablespoon of sea salt. Add in the green beans and simmer for 4 to 6 minute or until slightly tender. Use a slotted spoon to transfer the blanched green beans to the colander in the ice bath, discarding the remaining water in the pan. Once the green beans are cold, remove the colander and drain the beans.
  3. In the same skillet, melt 2 tablespoons of butter over medium-low heat. Add the shallots and a pinch of kosher salt. Stir, cooking until soft. About 5 minutes.
  4. Next add in the mushrooms, stir and cook until tender. About 5 to 8 minutes. Add in the minced garlic, stir and cook for 1 to 2 minutes. Then add in 4 tablespoons of butter.
  5. Once the butter has melted, sprinkle the flour over top, stir and cook for 2 to 3 minutes. Stir while pouring in the half and half, scraping any browned bits off of the bottom of the skillet. Increase the heat to medium-high, stirring constantly until thickened to a creamy soup consistency.
  6. Remove off of the heat and stir in the parmesan cheese. Season with the nutmeg, kosher salt and freshly ground black pepper. Add the green beans to the mushroom sauce and toss to coat.
  7. Transfer green bean mixture to the prepared baking dish, cover with aluminum foil and bake on the middle rack of your preheated oven for 20 minutes.
  8. Remove the foil and scatter the fried onions over top. Place back into your oven for 20 more minutes or until the onion are crisp and the casserole is bubbling.

Notes

If making in advance. Prep the onion rings and the casserole and store separately. Remove 30 minutes prior to baking, and follow the remainder of the instructions. Baking until bubbly and the onion rings are golden brown.

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Nutrition Information:

Yield:

8

Serving Size:

1

Amount Per Serving: Calories: 369Total Fat: 23gSaturated Fat: 12gTrans Fat: 0gUnsaturated Fat: 11gCholesterol: 48mgSodium: 1420mgCarbohydrates: 32gFiber: 4gSugar: 8gProtein: 8g

All information presented on this site is intended for informational purposes only. I am not a certified nutritionist and any nutritional information shared on SimplyScratch.com should only be used as a general guideline.

Fresh Green Bean Casserole with Onion Ring Topping l SimplyScratch.com