Creamy Smashed Potato Gratin (Printer-friendly)

Golden smashed potatoes with creamy layers, melted cheese, and herbs, offering a rich, crispy side for meals.

# Required Ingredients:

→ Potatoes

01 - 3.3 lbs small Yukon Gold or baby potatoes
02 - 1 tablespoon olive oil
03 - Salt and freshly ground black pepper to taste

→ Cream Mixture

04 - 1.5 cups heavy cream
05 - 2 cloves garlic, minced
06 - 1 teaspoon fresh thyme leaves or 0.5 teaspoon dried
07 - 0.5 teaspoon fresh rosemary, finely chopped
08 - 0.5 teaspoon ground nutmeg

→ Cheeses

09 - 1 cup grated Gruyère cheese
10 - 1 cup grated mozzarella cheese
11 - 0.5 cup grated Parmesan cheese

→ Garnish

12 - 2 tablespoons fresh chives or parsley, chopped

# How-To Steps:

01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - Place whole potatoes in a large pot, cover with salted water, and bring to a boil. Cook until fork-tender, approximately 15 to 18 minutes.
03 - Drain potatoes and let cool slightly. Transfer to the prepared baking sheet. Use a potato masher or the bottom of a glass to gently smash each potato to approximately 0.5 inch thick.
04 - Drizzle smashed potatoes with olive oil and season generously with salt and pepper. Roast in the oven for 20 minutes, or until edges are crisp and golden.
05 - In a small saucepan over low heat, combine heavy cream, garlic, thyme, rosemary, and nutmeg. Heat gently until just warmed and fragrant; do not boil.
06 - Arrange half the roasted smashed potatoes in a buttered baking dish. Pour over half of the cream mixture and sprinkle with half the Gruyère, mozzarella, and Parmesan.
07 - Layer the remaining potatoes, then top with the rest of the cream and cheeses.
08 - Bake in the oven at 425°F for 20 to 25 minutes, or until bubbly and golden brown on top.
09 - Let rest for 10 minutes before garnishing with fresh herbs and serving.

# Expert Suggestions:

01 -
  • It tastes impossibly luxurious but requires surprisingly little technique or stress.
  • The crispy-smashed potato texture is genuinely addictive, nothing like regular mashed or traditional gratin.
  • You can layer it ahead and bake it when guests arrive, keeping your hands free for everything else.
02 -
  • Don't skip the initial roasting step with olive oil; this is what creates the crispy texture that makes this gratin special, not just another creamy potato bake.
  • If your cream reaches a full boil with the garlic and herbs, it can separate—keep it low and gentle, letting the heat coax out the flavors slowly.
03 -
  • You can assemble this entirely the day before and bake it when needed, making it perfect for entertaining when you want to look calm and collected.
  • If the top isn't browning quickly enough in the final bake, switch your oven to broil for the last 2 to 3 minutes—watch it like a hawk, but it's a lifesaver.
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