INGREDIENTS
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12 medium Yukon Gold potatoes (3 1/2–4 pounds)
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Kosher salt
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5 large egg yolks
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2 garlic cloves, finely grated
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1 1/4 cups heavy cream
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3/4 cup sour cream
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10 tablespoons unsalted butter, melted
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1 teaspoon pink or black peppercorns, finely ground