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Classic Green Bean Casserole. Creamy mushroom soup, green beans, crispy fried onions.
Lady Maria

Best Green Bean Casserole

This Green Bean Casserole elevates the classic dish with fresh or frozen green beans, a flavorful homemade sauce, and perfectly crispy fried onions. It's a comforting and delicious side dish perfect for holidays, weeknight meals, or potlucks, guaranteed to be a crowd-pleaser. This recipe will make everyone ask for seconds!
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Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 6
Course: Side Dish
Cuisine: American
Calories: 250
Ingredients Equipment Method Notes

Ingredients
  

  • 1 tablespoon olive oil
  • 1 medium onion, chopped
  • 8 ounces cremini mushrooms, sliced
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/2 cup milk
  • 1 teaspoon soy sauce
  • 1/4 teaspoon garlic powder
  • 1 1/3 cups crispy fried onions, divided

Equipment

  • 9x13 inch baking dish
  • large skillet
  • Large bowl
  • whisk
  • measuring cups and spoons
  • Cutting board
  • knife
  • Steamer or pot (if using fresh green beans)
  • Oven

Method
 

  1. Preheat your oven to 350°F (175°C).
  2. Prepare the green beans. If using fresh green beans, trim and steam or boil them until tender-crisp. If using frozen, cook according to package directions. Drain well.
  3. Heat the olive oil in a skillet over medium heat. Add the chopped onion and cook until softened and translucent, about 5 minutes.
  4. Add the sliced mushrooms to the skillet and cook until they release their moisture and begin to brown, about 8-10 minutes. Season with salt and pepper.
  5. In a large bowl, combine the condensed cream of mushroom soup, milk, soy sauce, and garlic powder. Whisk until smooth and creamy.
  6. Add the cooked green beans and the sautéed onion and mushroom mixture to the bowl with the sauce. Gently stir to combine, ensuring the green beans are evenly coated.
  7. Pour the mixture into a 9x13 inch baking dish. Spread evenly.
  8. Sprinkle 2/3 cup of the crispy fried onions evenly over the top of the casserole.
  9. Bake in the preheated oven for 20-25 minutes, or until heated through and bubbly.
  10. Remove the casserole from the oven and sprinkle the remaining 2/3 cup of crispy fried onions over the top.
  11. Return the casserole to the oven and bake for another 5-10 minutes, or until the onions are golden brown and crispy.
  12. Let the casserole cool for a few minutes before serving.
  13. Serve and enjoy!

Notes

For best results, don't overcook the green beans during the initial cooking stage. They should be tender-crisp. To prevent the fried onions from burning, keep a close eye on the casserole during the final baking stage. Feel free to customize the flavor by adding a pinch of red pepper flakes for a little heat or shredded cheese for extra richness. Leftover casserole can be stored in an airtight container in the refrigerator for up to 3 days and reheated in the oven or microwave.