Recipes Side Dishes Vegetables Green Bean Casserole

Green Bean Casserole

Prep Time: 15 minutes
Cook Time: 30 minutes
Servings: 10

Serving a traditional Thanksgiving meal, complete with iconic side dishes like green bean casserole, is easier than ever with our starter kit. Dried porcini and champignon mushrooms in the kit elevate this classic holiday dish into something special.


  • 2 lb. (1 kg) green beans, trimmed
  • 2 2/3 cups (630 ml) half-and-half
  • 1 package (5.5 oz./156 g) green bean casserole starter  (includes seasoning mix, mushroom packet, and fried onion topping)


Preheat an oven to 350°F (180°C).

Bring a large pot of salted water to a boil over high heat. Add the green beans and cook until bright green, about 2 minutes. Drain the beans and plunge them into a bowl of ice water to cool. Drain again, place in a bowl and set aside.

In a large saucepan over medium-high heat, combine the half-and-half, seasoning mix and mushroom packet and bring to a boil. Cook, whisking constantly, until thickened, about 1 minute. Pour over the green beans and stir to combine. Pour the mixture into a 13-by-9-inch (33-by-23-cm) baking dish or large gratin and sprinkle the fried onion topping evenly over the top.

Bake until the edges are bubbling, about 25 minutes. Transfer to a wire rack and let rest for 5 minutes before serving. Serves 8 to 10.

Williams-Sonoma Test Kitchen