Mix soup, sour cream, milk, and green onions in a bowl; set aside
Pour 1/4 cup melted butter into a 9×13 inch baking dish
Add half of the package of hash browns to the baking dish; pour half of the soup mixture over the potatoes; spread evenly; sprinkle 1 cup shredded sharp cheddar cheese on top
Add remaining hash brown then the rest of the soup mixture; sprinkle the 1 cup of cheese; top with crushed corn flakes; melt 2 tablespoons of butter and drizzle on top of corn flakes