This Extra-Creamy Potato Casserole Wins the Award for Coziest Thanksgiving Side

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Cacio e Pepe Potato Gratin Recipe

Thinly sliced potatoes get tossed pinch a flavorful pick sauce, layered pinch plentifulness of Pecorino Romano, and baked until browned and bubbly.


Prep30 minutes

Cook1 hr 20 minutes

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A bluish baking crockery afloat of Cacio e Pepe Potato Gratin pinch a serving spoon inserted.

Credit: Photo: Ryan Liebe; Food Styling: Rachel Perlmutter

Cacio e pepe, a beloved Roman pasta crockery made pinch tons of Pecorino Romano and plentifulness of freshly crushed achromatic pepper, is simply a instrumentality favourite for a reason. In it, a fewer ingredients travel together to make thing truthful satisfying — it’s simplicity astatine its best. This year, I wanted to bring nan flavors of this iconic pasta to nan Thanksgiving array successful nan shape of potatoes. Meet your caller favourite broadside dish: cacio e pepe potato gratin. 

In nan classical dish, finely grated Pecorino Romano gets tossed pinch al dente pasta — and immoderate starchy pasta water — to output a rich | and creamy sauce. In this version, I flip thinly sliced potatoes pinch a cacio e pepe-flavored pick condiment made pinch butter, shallot, dense cream, water, and cheese.

Black capsicum is nan only herb successful this dish, truthful you’ll spot that nan look calls for a lot of it. Many of america thin to adhd capsicum to a crockery alongside salt, almost arsenic an afterthought. A crockery for illustration this brings capsicum to nan forefront, highlighting its spicy bite, and besides its floral spirit notes. 

Layered into a baking crockery and roasted until nan gratin is browned and bubbly, this super-flavorful broadside is judge to impressment your guests.

Credit: Photo: Ryan Liebe; Food Styling: Rachel Perlmutter

If You’re Making Cacio e Pepe Potato Gratin, a Few Tips

  • Switch up nan potatoes. I telephone for Yukon Gold potatoes, but you tin usage Russet potatoes instead. 
  • Slice nan potatoes into 1/8-inch-thick rounds. This ensures that nan potatoes navigator evenly and helps them sorb nan pick sauce. 
  • Make it ahead. You tin par-cook nan gratin up of erstwhile you scheme to service it. Bake nan assembled crockery for 45 minutes, uncover, and fto cool wholly earlier placing it successful nan refrigerator covered. The time of, cook nan gratin for 20 minutes to lukewarm it up, past summation nan oven temperature, uncover nan dish, and proceed to cook until browned connected top. 

Thinly sliced potatoes get tossed pinch a flavorful pick sauce, layered pinch plentifulness of Pecorino Romano, and baked until browned and bubbly.


  • 1 1/2 cups

    finely grated Pecorino Romano food (about 6 ounces), divided

  • 3 1/2 pounds

    Yukon Gold potatoes

  • 1

    large shallot

  • 2 tablespoons

    unsalted butter, divided positive much for nan baking dish

  • 1 tablespoon

    freshly crushed achromatic pepper, positive much for arsenic needed

  • 2 tablespoons

    kosher salt

  • 2 cups

    heavy cream

  • 1/4 cup


  1. Arrange a rack successful nan mediate of nan oven and power nan oven to 375ºF. Coat a 9x13-inch aliases different 3-quart baking crockery pinch butter.

  2. Finely grate 6 ounces Pecorino Romano food if needed, aliases measurement retired 1 1/2 cups store-bought grated. Peel and thinly portion 3 1/2 pounds Yukon Gold potatoes pinch a weapon aliases connected a mandolin into 1/8-inch-thick rounds. Place successful a ample bowl. Finely chop 1 ample shallot (scant 1 cup).

  3. Melt 2 tablespoons unsalted food successful a mini saucepan complete mean heat. Add nan shallot and play pinch 1 tablespoonful freshly crushed achromatic capsicum and 2 teaspoons kosher salt. Cook, stirring frequently, until nan shallot is soft and translucent and nan capsicum is fragrant, 3 to 4 minutes.

  4. Add 2 cups dense pick and 1/4 cup water, operation to combine, and bring to a gentle simmer. Remove nan cookware from nan heat. While whisking constantly, adhd 1 cup of nan food a fewer tablespoons astatine a time, and whisk until nan condiment is smooth.

  5. Transfer nan condiment to nan vessel of potatoes and flip thoroughly to coat. Arrange half of nan murphy substance successful nan baking crockery successful an moreover layer. Sprinkle pinch 1/4 cup of nan food and a fewer generous grinds of achromatic pepper. Arrange nan remaining murphy substance complete nan top. Pour nan remaining condiment from nan vessel evenly complete nan potatoes. Sprinkle pinch nan remaining 1/4 cup food and grind different generous magnitude of achromatic capsicum complete nan surface.

  6. Cover nan baking crockery tightly pinch aluminum foil. Bake until nan potatoes are tender, astir 45 minutes.

  7. Uncover nan baking dish. Increase nan oven somesthesia to 425ºF. Bake until nan apical is browned and nan condiment has thickened slightly, 20 to 25 minutes more. Let nan gratin cool for 10 minutes earlier serving, nan condiment will thicken arsenic it cools.

Recipe Notes

Make ahead: The gratin tin beryllium made up done nan first 45-minute baking step. Uncover and fto cool completely. Cover nan baking crockery tightly pinch aluminum foil and refrigerate for up to 5 days. To reheat, region from nan oven astir 1 hr earlier and power nan oven to 375ºF. Bake, still covered, for 20 minutes. Uncover and proceed pinch expanding nan oven somesthesia and baking for nan remaining time.

Substitutions: Russet potatoes tin beryllium substituted for nan Yukon Golds. One mini yellowish bulb tin beryllium substituted for nan shallot. Half-and-half tin beryllium substituted for nan dense cream. Some aliases each of nan Pecorino Romano food tin beryllium replaced pinch adjacent amounts of grated Parmesan cheese.

Storage: Leftovers tin beryllium refrigerated successful an airtight instrumentality for up to 5 days aliases stiff for up to 3 months. Thaw overnight successful nan refrigerator.