This cheesy casserole is comfort food at its easiest
Standard potato gratins rely on thinly sliced tubers layered with heavy cream, but this variation bypasses raw starch entirely by utilizing thawed frozen hash browns. Whisking condensed cream soup with sour cream creates a stable emulsion that resists curdling when heated to 350 degrees F.
Proper moisture control remains the sole defense against a soggy casserole. Monitor the bubbling edges closely during the final ten minutes of baking to gauge internal heat accurately.