INGREDIENTS
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5 pounds russet potatoes, peeled and cut into 2-inch pieces
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2 teaspoons kosher salt, plus more for boiling potatoes
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3/4 cup whole milk, heated, plus more as needed
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5 tablespoons unsalted butter, softened
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1/4 cup chopped fresh cilantro
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2 finely chopped chipotle chiles (canned in adobo sauce, seeds removed)
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1 teaspoon adobo sauce