Preheat the oven to 350ºF.

In a large, heatproof bowl, melt one stick of butter, Velveeta cheese, sour cream, and cream of chicken together. Microwave in one minute intervals, stirring after each minute, until the mixture is completed melted and smooth.

Add the frozen hash browns into a glass 9x13 baking dish. Pour the melted cheese mixture over the hash browns and stir to fully coat.

Generously top the hash browns with corn flakes.

Melt the remaining stick of butter and evenly pour over the corn flakes.

Bake the casserole for one hour.

Enjoy!