This green bean casserole is a delightful and easy-to-make dish perfect for any family gathering or holiday meal. Combining the creamy goodness of cream of mushroom soup with the crispiness of fried onions, this recipe brings a comforting and nostalgic flavor to your table. The green beans add a fresh and vibrant touch, making it a well-rounded side dish that everyone will love.
While most of the ingredients in this recipe are common pantry staples, you might need to visit Trader Joe's for their specific cream of mushroom soup and fried onions. These products have a unique flavor profile that enhances the overall taste of the casserole. Additionally, ensure you have soy sauce on hand, as it adds a subtle umami flavor that complements the dish perfectly.

Ingredients for Trader Joe's Green Bean Casserole
Green beans: Frozen green beans from Trader Joe's, providing a fresh and vibrant base for the casserole.
Cream of mushroom soup: A can of Trader Joe's cream of mushroom soup, adding creamy texture and rich flavor.
Fried onions: Trader Joe's fried onions, offering a crispy topping and a burst of flavor.
Milk: Used to thin out the cream of mushroom soup and create a smooth mixture.
Soy sauce: Adds a subtle umami flavor, enhancing the overall taste of the casserole.
Black pepper: Provides a hint of spice and balances the flavors in the dish.
Technique Tip for This Green Bean Casserole
When preparing the green beans for this casserole, consider blanching them first. This involves briefly boiling the green beans for 2-3 minutes and then plunging them into ice water. This technique helps to maintain their vibrant green color and crisp texture, ensuring they don't become overly soft during baking.
Suggested Side Dishes
Alternative Ingredients
trader joe's frozen green beans - Substitute with fresh green beans: Fresh green beans can provide a crisper texture and more vibrant flavor. Blanch them before using to maintain their color and crunch.
trader joe's frozen green beans - Substitute with canned green beans: Canned green beans are a convenient option and can be used directly, though they may be softer in texture.
trader joe's cream of mushroom soup - Substitute with homemade cream of mushroom soup: Making your own cream of mushroom soup allows for better control over ingredients and flavor, and can be made with fresh mushrooms, cream, and broth.
trader joe's cream of mushroom soup - Substitute with cream of celery soup: Cream of celery soup can provide a similar creamy texture with a slightly different flavor profile that complements green beans well.
trader joe's fried onions - Substitute with homemade fried onions: Slicing and frying your own onions can give a fresher, more flavorful topping.
trader joe's fried onions - Substitute with panko breadcrumbs: Panko breadcrumbs can add a crunchy texture on top, though they will have a different flavor compared to fried onions.
milk - Substitute with heavy cream: Heavy cream can make the casserole richer and creamier.
milk - Substitute with unsweetened almond milk: Unsweetened almond milk is a good dairy-free alternative that won't alter the flavor significantly.
soy sauce - Substitute with tamari: Tamari is a gluten-free alternative to soy sauce with a similar umami flavor.
soy sauce - Substitute with Worcestershire sauce: Worcestershire sauce can add a complex, savory flavor similar to soy sauce.
black pepper - Substitute with white pepper: White pepper can provide a similar heat and flavor without altering the color of the dish.
black pepper - Substitute with cayenne pepper: Cayenne pepper can add a bit of heat and a different flavor profile, though use sparingly to avoid overpowering the dish.
Other Alternative Recipes Similar to This Green Bean Casserole
How To Store / Freeze This Green Bean Casserole
Allow the green bean casserole to cool to room temperature before storing or freezing. This helps maintain the texture and prevents condensation from making it soggy.
For storing in the refrigerator:
- Transfer the casserole to an airtight container or cover the baking dish tightly with plastic wrap or aluminum foil.
- Store in the refrigerator for up to 3-4 days.
- When ready to reheat, preheat your oven to 350°F (175°C). Place the casserole in an oven-safe dish and cover with foil to prevent the fried onions from burning. Heat for about 20-25 minutes or until warmed through.
For freezing:
- If you plan to freeze the casserole, it's best to do so before adding the final layer of fried onions.
- Transfer the cooled casserole to a freezer-safe container or wrap it tightly with plastic wrap and then aluminum foil to prevent freezer burn.
- Label the container with the date and contents.
- Freeze for up to 2-3 months.
- When ready to bake, thaw the casserole in the refrigerator overnight.
- Preheat your oven to 350°F (175°C). Remove any plastic wrap and cover with foil. Bake for 25-30 minutes or until heated through.
- Add the reserved fried onions on top and bake for an additional 5 minutes until golden brown.
For individual portions:
- Divide the casserole into single-serving containers before storing or freezing. This makes it easier to reheat only what you need.
- Follow the same steps for refrigerating or freezing as mentioned above.
- Reheat individual portions in the microwave or oven. For the microwave, cover the container loosely and heat on medium power for 2-3 minutes, stirring halfway through. For the oven, follow the same reheating instructions as for the whole casserole.
How To Reheat Leftovers
Oven Method: Preheat your oven to 350°F (175°C). Place the leftover green bean casserole in an oven-safe dish. Cover it with aluminum foil to prevent the fried onions from burning. Heat for about 20-25 minutes, or until the casserole is warmed through. For a crispy topping, remove the foil during the last 5 minutes of reheating.
Microwave Method: Transfer a portion of the green bean casserole to a microwave-safe dish. Cover it with a microwave-safe lid or a damp paper towel to retain moisture. Heat on medium power for 2-3 minutes, stirring halfway through to ensure even heating. If the fried onions lose their crispiness, you can add a fresh sprinkle of them on top before serving.
Stovetop Method: Place the leftover green bean casserole in a non-stick skillet over medium-low heat. Add a splash of milk or cream of mushroom soup to keep it moist. Stir occasionally and heat for about 10-15 minutes, or until the casserole is warmed through. This method helps maintain the texture of the green beans and the fried onions.
Air Fryer Method: Preheat your air fryer to 350°F (175°C). Place the leftover green bean casserole in an air fryer-safe dish. Cover with aluminum foil to prevent the fried onions from burning. Heat for about 10-15 minutes, checking halfway through. Remove the foil during the last 3-5 minutes to crisp up the topping.
Toaster Oven Method: Preheat your toaster oven to 350°F (175°C). Place the leftover green bean casserole in a toaster oven-safe dish. Cover with aluminum foil to prevent the fried onions from burning. Heat for about 15-20 minutes, or until warmed through. For a crispy topping, remove the foil during the last 5 minutes of reheating.
Best Tools for Making This Green Bean Casserole
Oven: Used to bake the casserole at the specified temperature.
Mixing bowl: Used to combine the cream of mushroom soup, milk, soy sauce, and black pepper with the green beans and fried onions.
Baking dish: Used to hold the green bean mixture while it bakes in the oven.
Measuring cups: Used to measure out the milk and fried onions accurately.
Measuring spoons: Used to measure the soy sauce and black pepper.
Spatula: Used to stir the mixture and ensure everything is well combined.
Oven mitts: Used to safely handle the hot baking dish when removing it from the oven.
Timer: Used to keep track of the baking time to ensure the casserole is cooked perfectly.
How to Save Time on Making This Casserole
Use fresh green beans: Opt for Trader Joe's frozen green beans to skip the washing and trimming steps.
Pre-mix ingredients: Combine cream of mushroom soup, milk, soy sauce, and black pepper in advance to save time.
Microwave green beans: Quickly thaw the green beans in the microwave instead of waiting for them to defrost.
Preheat oven early: Start preheating your oven while you mix the ingredients to save waiting time.
Use a single dish: Mix everything directly in the baking dish to reduce cleanup time.

Trader Joe's Green Bean Casserole Recipe
Ingredients
Main Ingredients
- 1 lb Trader Joe's Frozen Green Beans
- 1 can Trader Joe's Cream of Mushroom Soup
- 1 cup Trader Joe's Fried Onions
- ½ cup Milk
- 1 teaspoon Soy Sauce
- ¼ teaspoon Black Pepper
Instructions
- Preheat your oven to 350°F (175°C).
- In a mixing bowl, combine the cream of mushroom soup, milk, soy sauce, and black pepper.
- Add the green beans and ⅔ cup of fried onions to the mixture. Stir well.
- Pour the mixture into a baking dish and spread it out evenly.
- Bake in the preheated oven for 25 minutes.
- Remove from the oven and sprinkle the remaining fried onions on top.
- Return to the oven and bake for an additional 5 minutes, or until the onions are golden brown.
- Let it cool for a few minutes before serving. Enjoy!
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