Mom's Cheesy Hashbrowns

Mom's Cheesy Hashbrowns (Click for printable copy)
These are so tasty!
Ingredients:

1/4 c. butter
1 sweet onion, chopped
2 c. shredded Cheddar Cheese
1 c. sour cream
30-oz pkg country-style frozen shredded hashbrowns, thawed

Directions: 

Melt butter in a medium saucepan over medium heat.  Add onion and cook until translucent, about 5 minutes.  Mix in cheese and continue stirring until melted.  Remove from heat; stir in sour cream.  Gently fold mixture into hasbrowns.  Spoon into a greased 2-quart casserole dish.  Bake, uncovered, at 350 degrees for 60-75 minutes, until heated through and top is golden.  Serves 6-8.