Green Bean Casserole

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A holiday classic, this Green Bean Casserole is taken to a gourmet level with portabella mushrooms and French haricots verts.

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I can’t remember a Thanksgiving or Christmas that did not include Green Bean Casserole. Of course, growing up in the ’80’s, it was always made with Cream of Chemical Soup and mushy canned green beans. Still, it was always one of my favorites and took up a good bit of real estate on my plate.

I’ve updated the classic with some Trader Joe’s items that make it so much more delicious. This recipe uses Trader Joe’s Condensed Cream of Portabella Soup, Gourmet Fried Onion Pieces, and French Green Beans and which give it a gourmet-level flavor.

And like all Trader Joe’s products, these do not have artificial colors, flavors, or preservatives. Without that chemical tang, everyone will think you made this casserole from scratch!

Green Bean Casserole

What You’ll Need to Make Green Bean Casserole

  • 1 Bag of frozen French green beans
  • 1 Container of Cream of Portabella Mushroom Soup
  • 1 Container of Gourmet Fried Onion Pieces
  • Soy sauce
  • Milk
  • Shredded Swiss cheese (optional, but delicious)
  • 1.5 Quart Casserole or Baking Dish


  • If you don’t mind an extra step, cutting the green beans in half will make it easier for children to eat this recipe.
  • If you don’t mind the taste of mushrooms, but hate the texture, you can push the Cream of Portabella Mushroom soup through a sieve to remove all of the mushroom bits.
  • The Swiss cheese is completely optional, but it gives this casserole a depth of flavor that I think you’ll love.

Green Bean Casserole

The holiday classic is taken to a gourmet level with portobello mushrooms and French haricot verts.
Prep Time10 mins
Cook Time30 mins
Total Time40 mins
Course: Side Dish
Cuisine: American
Keyword: Casserole, Green Beans


  • 1.5 Quart Casserole or Baking Dish


  • 1 Container Trader Joe's Cream of Portabella Mushroom Soup
  • ½ Cup Milk
  • 1 Teaspoon Soy Sauce
  • Salt, to Taste
  • Pepper, to Taste
  • 1 Bag Trader Joe's French Green Beans, Thawed
  • Cups Trader Joe's Gourmet Fried Onion Pieces Divided
  • ½ Cup Swiss Cheese, shredded


  • Preheat oven to 350°.
  • In your casserole dish, combine soup, milk, and soy sauce. Add salt and pepper to taste and then stir in the green beans and ½ cup of fried onion pieces so that they are well coated.
  • Bake for 25 minutes or until the casserole is bubbling. Stir the mixture and then top with the remaining onion pieces and the cheese if you are using it.
  • Bake for another 5 minutes or until the topping is golden.

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