*I have received feedback that store-bought dulce de leche absorbs into the cookie so it's best to try with the home-made kind. It's easy to make, so I urge you to try it! ** The cookie batter can get quite sticky as it warms up when you are forming balls. A suggestion to avoid this would be to form the dough into a log shape, wrapped in plastic wrap, and freeze until firm. Then slice the dough into the portions you need.