Cheesy Baked Potato Casserole : Cheesy Baked Potato Casserole 5 pounds red potatoes, cubed 1 pound bacon, cooked and crumbled 1 pound cheddar cheese, cubed 16 ounces shredded cheddar cheese 1 yellow onion, chopped 1 cup mayonnaise 8 ounces sour cream 1 tablespoon minced chives 1 teaspoon salt 1/2 teaspoon pepper Heat oven to 325° F. In large bowl, combine potatoes and bacon. In separate large bowl, combine cheese, onion, mayonnaise, sour cream, chives, salt and pepper. Add to potato and bacon mixture until combined. Pour into 9-by-13-inch baking dish. Bake 50-60 minutes until browned and bubbly.