Trader Joe’s Green Bean Casserole Recipe

This creamy, crunchy Trader Joes Green Bean Casserole Recipe is made with French green beans and mushroom soup and ready in 45 minutes. The bubbly sauce slowly thickens around the tender beans beneath a heavy blanket of golden fried onions. I always keep these specific ingredients stocked before the holiday rush hits.

Why This Classic Works

I used to think making this from scratch was required for good flavor, but using Trader Joe’s specific portabella mushroom soup changed my mind. The rich, earthy flavor balances the bright green beans perfectly without feeling overly processed.

My biggest mistake in the past was adding the crispy onions too early, causing them to burn before the center heated through. Now I wait until the final ten minutes to add the topping, ensuring a perfect crunch every time.

Trader Joes Green Bean Casserole Recipe Ingredients

• 32 oz Trader Joe’s frozen French Green Beans (thawed)
• 11 oz Trader Joe’s Cream of Portabella Mushroom Soup
• 1/2 cup whole milk
• 1 tsp Trader Joe’s Mushroom & Company Multipurpose Umami Seasoning
• 6 oz Trader Joe’s Gourmet Fried Onion Pieces

How To Make Trader Joes Green Bean Casserole Recipe

1. Prep the oven: Preheat your oven to 350°F and lightly grease a 9×13-inch baking dish.
2. Mix the base: In a large mixing bowl, whisk together the mushroom soup, whole milk, and umami seasoning until completely smooth.
3. Combine the ingredients: Stir in the thawed green beans and half of the fried onion pieces until everything is well coated.
4. Bake the casserole: Pour the mixture into your prepared dish and bake uncovered for 25 minutes until the sauce is bubbling at the edges.
5. Add the topping: Remove the dish from the oven, sprinkle the remaining fried onions evenly over the top, and bake for another 10 minutes.

Recipe Tips

• Thaw the beans: Thawing and draining frozen beans prevents a watery casserole base.
• Check the seasoning: Taste your soup mixture before mixing in the beans to see if you want extra black pepper.
• Watch the topping: Keep a close eye on the onions during the last few minutes so they brown but do not burn.

What To Serve With Green Bean Casserole

Serve this alongside roasted turkey or a glazed holiday ham for a traditional feast. It also pairs wonderfully with buttery mashed potatoes and soft dinner rolls to soak up any extra mushroom sauce.

How To Store

Keep leftovers in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F to help the onions regain some of their crunch. I do not recommend freezing this fully assembled, as the crispy onions will turn completely to mush.

FAQs

Can I use fresh green beans instead of frozen?

Yes, simply blanch fresh green beans in boiling salted water for 5 minutes and drain them well before using.

Can I prep this casserole ahead of time?

You can mix the beans and soup base a day in advance and store it in the fridge. Add the fried onions just before baking.

Is the Trader Joe’s mushroom soup vegan?

No, the standard cream of portabella soup contains dairy, but they sometimes carry seasonal vegan alternatives.

Nutrition

• Calories: 180 kcal
• Total Fat: 10 g
• Saturated Fat: 3 g
• Cholesterol: 5 mg
• Sodium: 350 mg
• Total Carbohydrate: 18 g
• Protein: 4 g

Try More Recipes:

• Trader Joe’s Hashbrown Breakfast Casserole Recipe
• Trader Joes Casserole Recipe
• Trader Joes Crunchy Onion Chili Oil Recipe

Trader Joes Green Bean Casserole Recipe

Recipe by Nate Collins

Servings

8

servings

Prep time

10

minutes

Cooking time

35

minutes

Total time

45

minutes

Creamy, crunchy Trader Joes Green Bean Casserole Recipe loaded with tender French green beans, rich portabella mushroom soup, and crispy fried onions. Ready in 45 minutes, this simple dish requires minimal effort and guarantees a comforting side for your holiday gathering.

Ingredients

• 32 oz Trader Joe’s frozen French Green Beans (thawed)

• 11 oz Trader Joe’s Cream of Portabella Mushroom Soup

• 1/2 cup whole milk

• 1 tsp Trader Joe’s Mushroom & Company Multipurpose Umami Seasoning

• 6 oz Trader Joe’s Gourmet Fried Onion Pieces

Directions

• Prep the oven: Preheat your oven to 350°F and lightly grease a 9×13-inch baking dish.
• Mix the base: In a large mixing bowl, whisk together the mushroom soup, whole milk, and umami seasoning until completely smooth.
• Combine the ingredients: Stir in the thawed green beans and half of the fried onion pieces until everything is well coated.
• Bake the casserole: Pour the mixture into your prepared dish and bake uncovered for 25 minutes until the sauce is bubbling at the edges.
• Add the topping: Remove the dish from the oven, sprinkle the remaining fried onions evenly over the top, and bake for another 10 minutes.