Premade phyllo dough pastry shells can also be used for this recipe. Preheat oven to 350 degrees F (175 degrees C). Place the pastry shells on a rimmed baking sheet, and bake in preheated oven for 8 minutes. Fill with the warm pecan mixture, and set aside to cool completely. Dust with powdered sugar, more cinnamon, or top with a scoop of whipped cream.