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Easy Green Bean Casserole: A Classic Favorite

This iconic Green Bean Casserole is a classic favorite holiday side dish. Requiring only minutes of prep, it can be made with canned, frozen, or fresh green beans. And with a couple of unique ingredients, this twist on a classic favorite is just as delicious as ever.

Serving of Green Bean Casserole on a white plate with casserole in the background

And simple? Oh my. When you’re cooking a holiday feast, simple side dishes mean everything. And this Green Bean Casserole is truly a simple side.

If you’ve never made or tasted this holiday classic before, think of tender green beans cooked in a mushroom sauce with a bit of melting cheese, and seasonings. Then top all of that goodness with crispy, oven-browned onions.

Green Bean Casserole

I mentioned this casserole is an iconic holiday favorite. In fact, it’s a tradition for many.

This recipe doesn’t deviate much from the classic version developed by Dorcas Reilley in 1955 for Campbell’s Soup. Except for a few added seasonings.

If you would like to try the original recipe, here is the official recipe card, along with her handwritten notes.

Original recipe card from Dorcus Reilly for Green Bean Casserole
Official recipe card for Green Bean Casserole
Original Green Bean Casserole recipe with Dorcas Reilly notes
Recipe Notes

What to Love About This Casserole:

  • Honestly, it takes minutes to prep, leaving you plenty of time to cook and prep the rest of the meal.
  • Kids love this dish, even if vegetables aren’t their favorite thing.
  • Make ahead-friendly as you can assemble the casserole and refrigerate it until ready to bake.
  • Easy to make with fresh, frozen, or canned green beans.
  • Crispy onions.
Top view of Green Bean Casserole ingredients on a round wood board

Ingredients in Green Bean Casserole

Here is all you need to make this incredibly simple dish. The exact measurements are in the recipe card at the bottom of this post.

Green Beans

For this recipe, you can use fresh, frozen, or even canned green beans. I also prefer cut green beans as they are bite size and work well in the casserole.

  • Canned green beans are soft and require zero prep. They’re ready to drain and use in the casserole.
  • Frozen green beans can be used frozen or parboiled, which is my preference, before proceeding with the recipe. I like to cook for about 5 minutes in boiling water.
  • Fresh green beans can also be used. They have a tender-crisp texture that makes them a delicious choice. Cut to the desired length and simmer for 8 minutes before proceeding with the recipe.

Mushroom Sauce

The base of this mushroom sauce is a can of condensed cream of mushroom soup. It’s what makes this casserole so incredibly easy. And perfect for holiday gatherings. To that sauce, you will add a bit of milk for consistency, shredded cheese for flavor and seasonings of salt, pepper, ground nutmeg, garlic powder, and a pinch of red pepper flakes. The pepper flakes are optional but SO good.

Shredded Cheese

This is a bit of a deviation in the classic, but I love the flavor of adding shredded cheese to this casserole. Use your favorite cheese, like cheddar, Parmesan, or an Italian mix are especially nice.

Crispy Fried Onions

Crispy Fried Onions is what makes this casserole iconic. While you can substitute buttered and toasted panko crumbs, the onions are hard to beat!

Top view of Green Bean Casserole in a white, fluted casserole dish

How To Make Green Bean Casserole

I keep using the word “easy” in this recipe because truly, it’s incredibly simple. And I love simple during holiday feasts. There are so many recipes that require my attention and detail. This isn’t one of them. Here’s how to make the casserole.

  1. Pre-Cook Green Beans: If you’re using fresh or frozen, cook the beans until crisp-tender. Drain the liquid.
  2. Make the Mushroom Sauce: Combine mushroom soup, milk, shredded cheese, salt, pepper, nutmeg, garlic powder, and red pepper flakes in a large bowl.
  3. Add Green Beans: Toss the green beans into the sauce, along with some crispy onions. Transfer to a prepared baking pan and add another layer on crispy onions over the top.
  4. Top & Bake Bake until golden.

How To Make Ahead Green Bean Casserole

If you’re planning a feast, or you want to make this casserole ahead to take to an event, it’s an easy dish to prep ahead. Here’s how:

  1. This recipe can be assembled ahead to the point of baking and stored in the refrigerator for up to 24 hours.
  2. Store the crispy onion topping separately and add it just before baking.
  3. When you’re ready to bake the casserole, remove from the refrigerator about 30 minutes before baking. You may need to add extra minutes to the cooking time.

Green Bean Casserole Questions

Should you cover green bean casserole when baking?

No. You should bake the casserole uncovered for 30 to 35 minutes, or until it’s bubbling in the center and the onions are becoming golden.

Can you make green bean casserole ahead?

Absolutely! Make the casserole ahead but do not add the crispy onion topping. Cover with foil and store in the refrigerator for up to 24 hours. When ready to bake, remove from the refrigerator, add the crispy onion topping and let sit while the oven preheats.

What main dish goes with green bean casserole?

Green beans are very versatile and go with almost any main dish you’re serving. They are particularly good for holidays with turkey, ham, chicken, roast beef, and pork.

Which size baking dish do you need for green bean casserole?

A 1.5-quart baking dish is perfect for this recipe.

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Side view of a portion of Green Bean Casserole on a white plate
Serving of Green Bean Casserole on a white plate with casserole in the background

Green Bean Casserole

This iconic Green Bean Casserole is a favorite holiday side with minutes of prep, can be made ahead with canned, frozen, or fresh green beans.
5 from 3 votes
Print Pin Rate Save
Prep Time: 10 minutes
Cook Time: 35 minutes
Servings: 8 servings
Author: Stephanie Wilson

Ingredients

  • 4 cups cut green beans frozen, fresh or canned
  • 10.5 ounces cream of mushroom soup
  • 1/2 cup milk
  • 1/2 cup shredded cheese cheddar, Parmesan, or your favorite blend
  • 1/4 teaspoon fine sea salt
  • 1/2 teaspoon ground black pepper
  • 1/4 teaspoon ground nutmeg
  • 1 ½ cups crispy fried onions divided

Instructions

  • Preheat oven to 350°F
  • For fresh or frozen green beans, boil under crisp tender; about 5 to 7 minutes.
    Top view of parboiled frozen green beans ready for assembling into Green Bean Casserole
  • Combine mushroom soup, green beans, milk, salt, pepper, nutmeg, and 1 cup of crispy onions. If you are using shredded cheese, stir that in as well. Transfer to a casserole dish.
    Top view of unbaked Green Bean Casserole filling in a glass bowl
  • Bake uncovered in preheated oven for 30 to 35 minutes or until bubbly.
  • Remove from the oven, stir, and top with remaining onions. Return to the oven and bake for another 10 minutes, or until the casserole is beginning to turn golden.

Video

Notes

How to Prep the Green Beans

For this recipe, you can use fresh, frozen, or even canned green beans. I also prefer cut green beans as they are bite size and work well in the casserole.
  • Canned green beans are soft and require zero prep. They’re ready to drain and use in the casserole.
  • Frozen green beans can be used frozen or parboiled, which is my preference, before proceeding with the recipe. I like to cook for about 5 minutes in boiling water.
  • Fresh green beans can also be used. They have a tender-crisp texture that makes them a delicious choice. Cut to the desired length and simmer for 8 minutes before proceeding with the recipe.

Making Ahead the Green Bean Casserole

If you’re planning a feast, or you want to make this casserole ahead to take to an event, it’s an easy dish to prep ahead. Here’s how:
  1. This recipe can be assembled ahead to the point of baking and stored in the refrigerator for up to 24 hours.
  2. Store the crispy onion topping separately and add it just before baking.
  3. When you’re ready to bake the casserole, remove it from the refrigerator about 30 minutes before baking. You may need to add extra minutes to the cooking time.

Nutrition

Calories: 115kcal | Carbohydrates: 11g | Protein: 3g | Fat: 7g | Saturated Fat: 3g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 0.5g | Cholesterol: 4mg | Sodium: 433mg | Potassium: 188mg | Fiber: 2g | Sugar: 3g | Vitamin A: 405IU | Vitamin C: 7mg | Calcium: 41mg | Iron: 1mg

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.

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Course: Side Dish, Casserole
Cuisine: American
Keyword: green bean casserole

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