1. Alfajores with Dulce de Leche
    These sandwich cookies will be the first one chosen at a cookie exchange or a buffet table. Sweetened condensed milk or ready-made dulce de leche cookie filling and a dusting of powdered sugar make these the sweetest of holiday treats. Make the center filling thin or thick and keep refrigerated till ready to serve. Kids are great help assembling the cookies; just be careful they don’t eat more than they sandwich.