Ingredients

  • 7 large sweet potatoes (about 5 pounds)
  • 18 cup stick unsalted butter, softened
  • 14 cup firmly packed brown sugar
  • 14 cup fresh orange juice
  • 14 cup orange marmalade
  • 1 tablespoon finely grated peeled fresh gingerroot
  • 2 teaspoons salt
  • 14 crisp oatmeal cookies, broken into pieces (about 3 cups)
  • 38-34 cup cold unsalted butter, cut into pieces

Method

  • Preheat oven to 450F.
  • Butter a baking dish, 13X9X2 inches.
  • Prick potatoes and bake in middle of oven until very soft, about 1 1/2 hours.
  • Scoop flesh into a large bowl and mash with butter, sugar, juice, marmalade, gingerroot, and salt.
  • Spread potato mixture evenly in baking dish.
  • Mixture may be made 1 day ahead and chilled, covered.
  • Bring to room temperature before proceeding.
  • ------------Forthe topping-------------------.
  • Food process cookies to fine consistency.
  • Add butter and pulse motor until mixture resembles soft cookie dough.
  • Wrap topping in wax paper and chill until firm, about 2 hours.
  • Topping may be made 1 day ahead and chilled, covered.
  • Preheat oven to 400F.
  • Crumble topping over potato mixture and bake in middle of oven until topping is browned lightly, about 25 minutes.