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Green Bean Alfredo Casserole

The new and improved way of making a traditional green bean casserole! Use a jar of Alfredo sauce instead of your classic cream of mushroom soup.

August 4, 2025 By Lilly

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This vegetable side dish is super easy and quick to prepare for just about any occasion, whether it’s a casual weeknight dinner at home or your next Thanksgiving feast. It’s totally impressive yet simple to make with just handful of basic ingredients!

Simple ingredient for making the best green bean casserole with Alfredo sauce instead of soup.

Ingredients

  • 2 (12 ounce) bags frozen green beans (thawed)
  • 1 (15 ounce) jar alfredo sauce
  • 6 ounces crispy fried onions
  • 1/4 cup grated parmesan cheese
  • Optional seasoning to taste (I use garlic powder and black pepper)

Green bean casserole in a lare dish topped with crispy French fried onions and parmesan cheese. This green bean casserole is improved from the classic with a jar of Alfredo sauce instead of your typical can of soup. No mushrooms!

Instructions

  1. Preheat oven to 350° F and grease a 9×9 or 7×11 baking dish.
  2. Combine the thawed green beans, jar of Alfredo sauce, and optional seasoning such as black pepper or garlic powder. No salt needed!
  3. Place the mixture into your greased baking dish and evenly sprinkle the parmesan cheese over the top.
  4. Bake for 25 minutes in the center rack of your oven.
  5. Top the casserole with crispy fried onions and continue baking for 5 more minutes.

A huge upgrade from your traditional green bean casserole!

The best way to make a green bean casserole with Alfredo sauce! This yummy vegetable side dish is great for Thanksgiving but it's quick and easy enough to make any night of the week for a casual dinner at home. You picky kids will love it because it's made with no mushrooms!

Made with frozen green beans and a jar of Alfredo, this is the kind of quick side dish that says, “I want to look like I tried without actually trying.” It’s creamy, crispy, and totally addictive.

“A great way to get your kids to eat veggies! Even my picky eaters asked for seconds which is a miracle in my house. We paired it with grilled chicken and garlic toast.”
“Goodbye cream of mushroom soup! This vegetable casserole was a huge hit for Thanksgiving. I doubled the recipe for my large family.”

Quick and easy green bean casserole vegetable side dish made with a jar of Alfredo sauce, frozen green beans, and crispy French fried onions.

A delicious way of making a traditional green bean casserole with Alfredo sauce.
Print Recipe

Green Bean Alfredo Casserole

Whether you're looking for a yummy green bean casserole for Thanksgiving or simply want to make a vegetable side dish for a casual dinner at home, you can't go wrong with a jar of Alfredo sauce! This simple swap will take just about any casserole from boring to totally addicting.
Prep Time5 minutes mins
Cook Time30 minutes mins
Course: Side Dish
Keyword: easy recipes, few ingredients, thanksgiving, vegetable side dish
Servings: 6

Ingredients

  • 2 (12oz) bags frozen green beans (thawed)
  • 1 (15oz) jar Alfredo sauce
  • 1/4 cup grated parmesan cheese
  • 1 (6oz) container crispy fried onions
  • seasoning to taste

Instructions

  • Preheat oven to 350° F and grease the sides of a 1½ quart dish (9x9 or 7x11).
  • Place the thawed green beans into a large bowl ensuring that any excess liquid is drained. Toss them with the Alfred sauce and seasoning of choice. I use black pepper and garlic powder. No salt needed!
  • Place the green bean mixture into your prepared dish and evenly sprinkle the parmesan cheese over top.
  • Bake in the center rack of your oven for 25 minutes. Place the French fried onions on top and continue baking for another 5 minutes or until crispy.

Notes

  • Are you feeding a large family for Thanksgiving? Double the recipe and use a 9x13 baking dish. Toss in about a quarter of the crispy onions to the green bean mixture before baking. I would also add about 5 minutes to the baking time BEFORE the remaining crispy onions are added to the top. 
  • You can also try this vegetable side dish with thawed broccoli or anything else that pairs well with Alfredo sauce. 
  • If you want to make this simple casserole into more of a meal, try tossing in some pulled rotisserie chicken or cooked sausage.

Don’t forget to pin and save this easy green bean casserole for later! 🙂

If you're looking for an easy green bean casserole recipe made with no mushroom soup, try Alfredo sauce instead. It's so simple to make with just a few ingredients including frozen green beans, store-bought Alfredo sauce, cheese, and French fried onions. Simple yet impressive for your picky family on Thanksgiving or even a casual weeknight vegetable side dish.

Need a few vegetable side dish ideas for dinner? Try this green bean Alfredo casserole! It's great for holidays, family dinners, Thanksgiving, and more. The Alfredo sauce is so much better than the traditional cream of mushroom soup, yet just as easy to make thanks to frozen green beans and crispy onions. The best yummy green bean casserole veggie side dish for dinner made with a store bought jar of Alfredo sauce, parmesan cheese, and frozen green beans. And don't forget the delicious crispy French fried onions! So simple to make for a family of 6 but you can double the recipe if you're feeding a crowd.

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Filed Under: 5 Ingredients or Less, Comfort Food, Holiday, Quick & Easy Casseroles, Quick & Easy Dinner Recipes, Recipes, Side Dishes, Thanksgiving, Vegetables, Vegetarian Tagged With: alfredo sauce, comfort food, dinner side dish ideas, few ingredients, green beans, picky eaters, thanksgiving, vegetable side dishes

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