Heat and prep: Turn your oven to 350°F and spray your baking dish so nothing sticks to it.
Mix creamy base: Stir the melted butter, soup, and sour cream together until it's smooth and looks good.
Add spices: Put in the onion powder, thyme, salt, and pepper - mix it all up really well.
Fold in potatoes: Add the hashbrowns and most of the cheese until everything gets coated with the creamy stuff.
Put in dish: Spread it all out evenly in your pan and smooth the top with your spoon.
Top with cheese: Sprinkle the rest of the cheese on top because more cheese makes everything better, always.
Bake it: Cook for 45-50 minutes until it's golden and bubbly, then let it cool down first.