Hash browns are usually a breakfast thing--crispy and served with eggs. I love what happens when I combine them with other ingredients and bake into a casserole, mixing all the flavors and textures into one delicious cheesy, crispy and creamy bite!
Preheat oven to 400 degrees F. Grease a 9-by-9-inch casserole dish with the butter and set aside.
Add the hash browns, 7 ounces (about 3 1/2 cups) of the Cheddar, the sour cream, onion, egg, paprika, cayenne and 1/4 cup of the chopped chives to a large bowl. Season with salt and pepper and stir until combined. Pour into the prepared casserole dish and top with the remaining 1 ounce (1/2 cup) Cheddar.
Bake for 45 minutes until the casserole is heated through, browned on top and the sides become crispy. Let cool for 5 minutes. Cut into slices and dollop with more sour cream and the remaining 2 tablespoons chives.