cheesy hashbrown casserole

Ingredients For cheesy hashbrown casserole

• 1/4 c

  butter, plus a little extra for dish
• 1

  onion,chopped
• 1

  16 oz container of sour cream
• 1

  10 1/2 oz can of cream of celery
• 1

  8 oz of shredded cheddar and montery jack cheese
• 1/2 tsp

  garlic powder
• 1

  30 oz pack of frozen shredded hashbrowns thawed
• 1 tsp

  salt
• 1/2 tsp

  pepper
• 2 c

  crushed potato chips