This creamy and flavorful green bean casserole is topped with a crunchy layer, making it a delightful addition to any meal.
Preheat your oven to 400°F (200°C).
Preheating ensures even cooking and a crispy topping.
Melt the butter in a saucepan over medium heat.
Use unsalted butter to control the saltiness of the dish.
Add the flour, salt, and pepper to the melted butter and whisk until smooth.
Whisking continuously prevents lumps from forming.
Stir in the sour cream and cook until the mixture thickens.
Keep stirring to avoid burning the sauce.
Combine the green beans, cheese, and prepared sauce in a mixing bowl.
Mix gently to coat the beans evenly without breaking them.
Transfer the mixture to a baking dish and spread it evenly.
Use a spatula to smooth the top for even baking.
Sprinkle the cornflakes evenly over the top.
Crush the cornflakes slightly for a finer texture.
Bake in the preheated oven for 20 minutes or until the top is golden and bubbly.
Check halfway through to ensure the topping doesn't burn.
Let the casserole cool for a few minutes before serving.
Cooling slightly helps the casserole set and makes serving easier.
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