Green Bean Casserole

Meet the star of your holiday table – the ultimate green bean casserole. The green beans are fresh and bright, and baked in an ultra-flavorful mushroom cream sauce, a velvety mixture that laced with crispy fried onions and thyme. Baked under a canopy of extra crispy fried onions, this is the quintessential vegetable side dish

Course Side Dish

Cuisine American

Diet Vegetarian

Keyword green bean casserole, holiday side dish recipe

Prep Time 20

Cook Time 20

Total Time 40

Servings

Calories 233kcal

Author Robin Miller

Ingredients

1 1/2 pounds green beans ends trimmed and halved crosswise
2 tablespoons olive oil
8 ounces mushrooms cremini or button, thinly sliced
2 tablespoons tamari sauce or soy sauce
4 cloves garlic minced
1 tablespoon fresh thyme leaves
1/4 cup all-purpose flour
2 1/2 cups milk preferably whole milk
1 teaspoon Dijon mustard
1/2 cup grated Parmesan cheese
Salt and freshly ground black pepper
1 3/4 cups crispy fried onions divided

Instructions

Preheat the oven to 350 degrees. Coat a 13x9-inch baking pan with cooking spray or a thin layer of olive oil.
Bring a large pot of salted water to a boil. Add the green beans and blanch for 4 minutes. Drain and immediately transfer the green beans to a bowl of ice water to prevent further cooking. Drain and transfer the green beans to paper towels to dry.
Heat the olive oil in a large skillet over medium heat. Add the mushrooms and cook for 5 to 7 minutes, until tender and releasing liquid. Add the tamari sauce, garlic, and thyme and stir to combine.
Add the flour and stir to coat.
When the flour is fully incorporated, add the milk and Dijon mustard and bring to a simmer, stirring constantly. Reduce the heat to medium-low and simmer for 5 to 7 minutes, until the sauce thickens to a gravy-like consistency. Fold in the parmesan cheese and 1/4 teaspoon black pepper. Fold in the green beans and 1 cup of the crispy fried onions.
Transfer the mixture to the prepared pan and bake for 20 to 25 minutes, until bubbly.
Top with the remaining 3/4 cup of crispy fried onions and bake for 5 to 7 more minutes, until golden and crisp on top.
Serve hot.

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