← BlogJune 28, 2026

How to Make the Perfect Green Bean Casserole

American · Easy · 45 min · 8 servings

vegetarian
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Green Bean Casserole

A classic American comfort dish featuring tender green beans baked in a rich mushroom cream sauce. Topped with crispy fried onions for the perfect crunch.

Why this recipe works

This Green Bean Casserole recipe has been crafted to deliver restaurant-quality results in your home kitchen. At just 45 minutes from start to finish, it fits perfectly into a busy schedule without sacrificing flavor. Each serving comes in at 210 calories with 5g of protein, making it a balanced choice for any meal.

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What you will need

This recipe uses 8 simple ingredients that you can find at any grocery store:

  • 900 g fresh green beans trimmed and cut
  • 2 cans cream of mushroom soup
  • 240 ml whole milk
  • 1 tsp soy sauce
  • 0.5 tsp black pepper
  • 0.25 tsp garlic powder
  • 180 g crispy fried onions
  • 0.5 tsp kosher salt

Step by step instructions

Step 1: Blanch the Green Beans

Bring a large pot of salted water to a boil. Add green beans and cook for 5 minutes until bright green and slightly tender. Drain and immediately transfer to an ice bath to stop cooking. Drain again thoroughly.

Step 2: Make the Sauce

Preheat oven to 190 degrees C. In a large bowl whisk together cream of mushroom soup, milk, soy sauce, black pepper, and garlic powder until smooth and well combined.

Step 3: Combine and Layer

Add the blanched green beans to the sauce mixture and stir to coat evenly. Pour the mixture into a greased 9x13 baking dish and spread into an even layer.

Step 4: Add Topping and Bake

Sprinkle half the crispy fried onions over the green bean mixture. Bake uncovered for 25 minutes until the sauce is bubbling around the edges.

Step 5: Finish and Serve

Remove from oven and top with the remaining crispy fried onions. Return to oven for 5 more minutes until onions are golden. Let rest for 5 minutes before serving.

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Easy substitutions

Missing an ingredient? Here are some swaps that work perfectly:

  • fresh green beans → frozen green beans thawed and drained
  • cream of mushroom soup → homemade mushroom bechamel sauce
  • whole milk → chicken broth for a lighter version

Common mistakes to avoid

Watch out for these pitfalls that can affect your results:

  • Skipping the ice bath after blanching causes mushy overcooked beans
  • Do not skip draining the beans thoroughly or the casserole becomes watery
  • Adding all the onions at the start causes them to become soggy instead of crispy

Nutrition facts

Per serving: 210 calories, 5g protein, 24g carbs, 11g fat, 3g fiber.

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