Thaw frozen hash browns completely and squeeze out excess moisture with paper towels to prevent a watery casserole and ensure a creamy, cohesive texture.

Lightly toast crushed wavy potato chips in a dry skillet for 2-3 minutes before adding to the top layer to intensify flavor and maintain crispness instead of becoming soggy.

Bring sour cream and cream of mushroom soup to room temperature before mixing to ensure even distribution and prevent lumps in your binding mixture.

Combine hash browns, cheese, and soup mixture gently in a separate bowl before transferring to the baking dish to ensure uniform flavor distribution without overworking the potatoes.

Bake covered at 350°F for 25 minutes, then uncover and bake an additional 15-20 minutes until the potato chip topping is golden and edges are bubbly for ideal texture contrast.