Green Bean Casserole Crispy Onions (Printable)
Tender green beans cooked in creamy mushroom sauce with a crunchy topping, perfect for any meal.
# What You'll Need:
→ Vegetables
01 - 1 1/2 pounds fresh green beans, trimmed and cut into 2-inch pieces
02 - 1 small yellow onion, finely chopped
03 - 2 cloves garlic, minced
04 - 8 oz cremini or button mushrooms, sliced
→ Sauce
05 - 2 tablespoons unsalted butter
06 - 2 tablespoons all-purpose flour
07 - 1 cup whole milk
08 - 3/4 cup low-sodium vegetable broth
09 - 1/2 cup heavy cream
10 - 1/2 teaspoon salt
11 - 1/4 teaspoon black pepper
12 - 1/4 teaspoon ground nutmeg (optional)
→ Topping
13 - 1 1/2 cups crispy fried onions (store-bought or homemade)
# How-To Steps:
01 - Preheat the oven to 375°F. Grease a 9x13-inch baking dish with butter or cooking spray.
02 - Bring a large pot of salted water to a boil. Add green beans and cook for 5 minutes until just tender. Drain and immediately transfer to a bowl of ice water to stop the cooking process. Drain again and set aside.
03 - In a large skillet over medium heat, melt the butter. Add chopped onion and cook for 3 minutes until softened. Add garlic and mushrooms; sauté for 5 to 6 minutes until mushrooms are golden and tender.
04 - Sprinkle flour over the vegetables and stir constantly for 1 minute to cook out the raw flour taste.
05 - Gradually whisk in milk, broth, and cream. Add salt, pepper, and nutmeg. Bring to a simmer and cook, stirring often, until sauce thickens and coats the back of a spoon, about 5 minutes.
06 - Add the blanched green beans to the skillet and stir to coat evenly with the creamy mushroom sauce.
07 - Transfer the mixture to the prepared baking dish. Top with crispy fried onions in an even layer.
08 - Bake uncovered for 20 minutes, or until the sauce is bubbly and the crispy onions are golden brown on top.
09 - Let the casserole rest for 5 minutes before serving to allow the sauce to set slightly for easier scooping.
# Expert Advice:
01 -
- The homemade sauce puts canned soup versions to shame with hardly any extra effort
- That crispy onion topping creates the most irresistible crunch against creamy beans
- It actually tastes even better made ahead, leaving you oven space for everything else
02 -
- Blanching the beans first prevents them from becoming rubbery or tough during baking
- The sauce will look thin at first but thickens beautifully as it bakes
- Room temperature ingredients prevent the sauce from breaking when you combine everything
03 -
- Cut beans into uniform pieces so they cook evenly and look elegant on the plate
- Don't skip the nutmeg, it's the subtle background note that makes the sauce taste professional