Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Mix first 7 ingredients in a large bowl., Pour in greased 13 x 9-inch pan., Top with cereal, then pour over melted butter., Bake at 350 for 45 minutes or until bubbly in center., Serves 10 to 12.
frozen hash browns, cream soup, sour cream, onion, salt, pepper, grated sharp, cereal, butter