Why You'll Love This Recipe
A holiday gathering isn’t complete without a dish that feels both indulgent and familiar. This creamy potato gratin delivers buttery richness, punctuated by aromatic garlic and thyme, making it the star of any festive spread.
The recipe balances luxurious dairy with simple pantry staples, so you can assemble it in minutes and let the oven do the work. It’s the perfect side when you want to impress without stress.
Whether you’re serving a traditional turkey or a plant‑based centerpiece, the gratin’s golden crust and velvety interior create a comforting bridge between classic flavors and modern expectations.
Instructions
Prepare the potatoes
Slice potatoes 3 mm thick using a mandoline or sharp knife. Rinse briefly in cold water, pat dry, and set aside on a clean kitchen towel.
Make the cream mixture
In a saucepan, combine heavy cream, minced garlic, thyme, pepper, and salt. Warm over medium heat until just simmering; do not boil. Remove from heat and stir in half of the Gruyère.
Layer the gratin
Grease a 9‑inch baking dish with butter. Arrange a third of the potatoes, overlapping slightly. Pour one‑third of the cream mixture, then sprinkle with a third of the remaining Gruyère. Repeat twice.
Bake to perfection
Cover with foil and bake at 180 °C (350 °F) for 30 minutes. Remove foil, drizzle melted butter over the top, and continue baking 15‑20 minutes until the surface is golden and potatoes are fork‑tender.
Rest and serve
Allow the gratin to rest 10 minutes before cutting. This lets the sauce set, making clean slices and preserving the creamy interior.
Expert Tips
Tip #1: Uniform Slices
A mandoline guarantees even thickness, which cooks the potatoes uniformly and prevents soggy spots.
Tip #2: Cheese Placement
Reserve a generous final layer of cheese; it creates the signature golden crust that defines a great gratin.
Tip #3: Flavor Boost
Add a pinch of freshly grated nutmeg to the cream for a subtle, festive warmth.
Tip #4: Reheat Gracefully
Cover with foil and warm at 150 °C (300 °F) for 20 minutes; the top stays crisp while the interior stays creamy.
Storage & Variations
Cool the gratin completely, then refrigerate in an airtight container for up to 3 days. Reheat covered, then uncover for the last 5 minutes. Swap Gruyère for smoked mozzarella for a subtle smoky note, or stir in sautéed leeks for extra depth.
Nutrition
Per serving
