7. Bake in two acts
→ Covered (35–40 mins): Bake at 375°F (190°C) until potatoes are almost tender when pierced (a slight resistance remains).
→ Uncovered (20–25 mins): Remove foil. Bake until top is deeply golden, edges are bubbling, and a knife slides through potatoes with zero resistance. If top browns too fast, loosely tent with foil for final 5 minutes.
8. Rest with reverence
Remove from oven. Let rest 15 minutes uncovered—this is critical. The sauce thickens from runny to velvety; layers set for clean scooping. Sprinkle with flaky salt and fresh thyme just before serving.
Frequently Asked Questions
Q: Can I use milk instead of heavy cream?
A: Not recommended—it lacks the fat needed to prevent curdling and create silkiness. For lighter version: use half-and-half + 1 tbsp cornstarch whisked into cream. Flavor and texture will differ.
Q: My potatoes are still firm after baking! Why?
A: Two culprits: (1) Slices too thick—aim for ⅛-inch max; (2) Cream too cold—room-temp cream heats faster, cooking potatoes evenly. Next time: slice thinner and let cream warm 10 mins before mixing.
Q: Can I make this ahead?
A: Yes—assemble (unbaked) up to 8 hours ahead; cover and refrigerate. Add 5–7 minutes to covered bake time since dish starts cold. Do not fully bake ahead—reheating makes potatoes gluey.
Q: Dairy-free option?
A: Use full-fat canned coconut milk (shake well) + 2 tbsp nutritional yeast + ¼ tsp white miso for umami. Flavor will be distinctly different but still satisfying. Avoid almond/oat milk—they curdle.
Allergy Information
