Creamy Smashed Potato Gratin (Printable)

Layers of crispy smashed potatoes with cream, melted cheeses, and herbs baked to golden brown delight.

# What You Need:

→ 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 thyme
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

# Directions:

01 - Preheat oven to 425°F and 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 allow to cool slightly. Transfer to prepared baking sheet and use a potato masher or 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 oven for 20 minutes until edges are crisp and golden.
05 - In a small saucepan over low heat, combine heavy cream, minced garlic, thyme, rosemary, and nutmeg. Heat gently until warmed and fragrant, avoiding boiling.
06 - Arrange half the roasted smashed potatoes in a buttered baking dish. Pour over half of the cream mixture and sprinkle with half of the Gruyère, mozzarella, and Parmesan cheeses.
07 - Layer the remaining potatoes on top, then pour over remaining cream mixture and finish with remaining cheeses.
08 - Bake at 425°F for 20 to 25 minutes until bubbly and golden brown on top.
09 - Allow gratin to rest for 10 minutes before garnishing with fresh herbs and serving.

# Expert Advice:

01 -
  • The edges get impossibly crispy while the insides stay creamy and tender—textural contrast that feels indulgent.
  • It looks fancy enough for guests but comes together in about an hour with mostly hands-off time.
  • The herb-infused cream transforms humble potatoes into something that tastes like you've been cooking all day.
02 -
  • Don't skip the initial roasting of smashed potatoes—those crispy edges are what prevent this from becoming a one-note creamy puddle.
  • Never boil the cream mixture; gentle warmth is all you need to marry the flavors without breaking the cream or cooking off the fresh herbs.
  • Use a buttered baking dish so the bottom layer doesn't stick, and let the gratin rest after baking so you can actually get neat portions.
03 -
  • The key to crispy edges on your smashed potatoes is starting with a hot oven and not covering the baking sheet—air circulation is your friend.
  • Taste the cream mixture for seasoning before pouring it over the potatoes, since the cheeses will add salt and you want to balance flavors carefully.
  • If your gratin tops are browning too quickly while the inside is still cold, tent it loosely with foil for the last few minutes of baking.
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