Streusel-Topped Sweet Potato Custards
["1/4 cup packed brown sugar", "1/4 cup chopped pecans", "3 tablespoons flour", "2 tablespoons butter, soft", "3 cups flour", "2 tablespoons pumpkin pie spice", "2 teaspoons baking soda", "1 teaspoon salt", "2 sticks butter, soft", "1 cup sugar", "1 cup packed brown sugar", "4 eggs", "1 can (15 ounce) pumpkin", "1 teaspoon vanilla", "3/4 cup chopped pecans"]
["Pour batter over nuts.", "Bake at 325 degrees for 60-70 min. until wooden pick inserted in cake comes out clean.", "Cool 10 minutes."]
["brown sugar", "pecans", "flour", "butter", "flour", "pumpkin pie spice", "baking soda", "salt", "butter", "sugar", "brown sugar", "eggs", "pumpkin", "vanilla", "pecans"]