Dulce de leche is a milk-based sauce with origins in Spain and Portugal. It has grown especially popular in several South American countries such as Argentina, Bolivia, Brazil, Chile, and Venezuela. It can be used in many ways such as in recipes like Dulce de Leche Ice Cream Torte, Mexican Chocolate Icebox Cookies with Dulce de Leche Filling, or Gingerbread Roulade with Dulce de Leche Cream Filling.