Can I make this casserole the night before?
Yes. Assemble completely, cover, and refrigerate up to 24 hours. Bake directly from the fridge; add 10–15 minutes to baking time.
Can I use fresh hash browns instead of frozen?
Frozen diced hash browns are recommended because they release less moisture when thawed. Fresh hash browns may make the casserole watery; squeeze them dry if you use them.
What can I substitute for the cream soups?
Use 2 cups homemade béchamel or cream sauce. Condensed cream of mushroom or cream of potato soup also work well.
Can I double this recipe?
Yes. Double all ingredients and bake in two 9×13-inch dishes, or one larger pan if available. Check doneness at the regular time; adjust if needed.
Can I freeze this casserole?
Freeze unbaked up to 3 months. Do not thaw; bake from frozen at 350°F for 60–75 minutes, covered, then uncover and bake until golden.