Ingredients

  • 1 1/4 pounds russet potatoes (about 2 medium), peeled and chopped
  • 1 1/4 pounds sweet potatoes (about 2 medium), peeled and chopped
  • Kosher salt
  • Pinch of cayenne pepper
  • 1 1/2 sticks (12 tablespoons) salted butter, cut into pieces, at room temperature
  • 1/4 to 1/2 cup milk, warmed
  • Freshly ground black pepper
  • 1/3 cup chopped pecans
  • 1 to 2 teaspoons packed light brown sugar

Method

  • Put all the potatoes in a large saucepan and cover with cold water by 1 inch.
  • Season generously with salt and bring to a boil.
  • Reduce the heat to medium and simmer until very tender, about 15 minutes.
  • Drain the potatoes; return to the saucepan over low heat.
  • Cook until any remaining water evaporates, about 2 minutes.
  • Add the cayenne, 1/2 teaspoon salt and all but 2 tablespoons butter; mash with a potato masher until smooth.
  • Gradually mash in the milk until creamy.
  • Season with black pepper; transfer to a serving dish.
  • Melt the remaining 2 tablespoons butter in a skillet over medium heat until just beginning to brown, 3 to 5 minutes.
  • Stir in the pecans; cook until lightly toasted, 1 to 2 minutes, then remove from the heat.
  • Stir in the brown sugar; pour over the mashed potatoes.
  • Photograph by Ryan Dausch