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Green Bean and Potato Casserole

Creamy Green Bean and Potato Casserole

A comforting and flavorful casserole featuring tender potatoes and green beans in a creamy cheese sauce. Perfect for a weeknight dinner or potluck.
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Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings: 6 servings
Course: Main Course, Side Dish
Cuisine: American, Comfort Food
Calories: 350
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 1 lb Green beans trimmed and halved
  • 2 lbs Potatoes peeled and thinly sliced (about 1/4 inch thick)
  • 1 medium Onion chopped
  • 1/2 cup Butter
  • 1/2 cup All-purpose flour
  • 3 cups Milk
  • 1 teaspoon Salt
  • 1/2 teaspoon Black pepper
  • 1/4 teaspoon Nutmeg
  • 1 1/2 cups Cheddar cheese shredded

Equipment

  • 9x13 inch baking dish
  • Large saucepan
  • Colander

Method
 

Instructions
  1. Preheat oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish.
  2. Steam or boil green beans until tender-crisp, about 5-7 minutes. Drain well and set aside.
  3. In a large saucepan, melt butter over medium heat. Add onion and cook until softened, about 5 minutes.
  4. Stir in flour and cook for 1 minute, stirring constantly, to make a roux. Gradually whisk in milk until smooth. Bring to a simmer, stirring constantly, until sauce thickens.
  5. Remove from heat and stir in salt, pepper, and nutmeg. Reserve 1/2 cup of cheese sauce for topping.
  6. In the prepared baking dish, layer half of the potato slices, then half of the green beans. Pour half of the cheese sauce over the vegetables. Repeat layers with remaining potatoes, green beans, and cheese sauce.
  7. Sprinkle the remaining cheddar cheese and reserved cheese sauce over the top.
  8. Bake for 30-40 minutes, or until potatoes are tender and casserole is bubbly and golden brown. Let stand for 10 minutes before serving.

Notes

For a richer flavor, use a combination of cheddar and Gruyere cheese. You can also add other vegetables such as carrots or peas. Leftovers can be stored in the refrigerator for up to 3 days.