Crock Pot Hash Brown Casserole

Name: Crock Pot Hash Brown Casserole
Ingredients: 26 ounce bag frozen shredded hash browns ((thawed, can be cold just not frozen)); 4 Tablespoons (½ stick) salted butter, melted ((can use unsalted)); ¾ cup sour cream; 10.5 ounce can cream of chicken soup ((can use low or no sodium)); 1 teaspoon onion powder; 1 teaspoon dried minced onion; 1 teaspoon kosher salt; ½ teaspoon ground pepper; 3 cups shredded Colby Jack cheese ((divided use)); 2 teaspoons dried parsley ((optional, for garnish))