Spam Hashbrown Bake

• 2 potato chips (crushed)
• 350 ml sour cream
• 230 gr cheddar cheese (shredded)
• 120 ml milk
• 110 gr butter
• 60 gr onion (chopped)
• 38 gr chi chis green (diced)
• 3 gr salt
• 3 gr pepper
• 2 gr garlic powder