*Dulce de leche is similar to sweetened condensed milk, but it has been caramelized and is much thicker and is caramel in color. It can be found near the sweetened condensed milk or Hispanic sections in the grocery store. If you can't find it, substitute 42 round chewy caramels in milk chocolate (from 12-oz bag), unwrapped. No need to freeze these, just unwrap from the gold foil and insert in the indentation as directed in step 3. Continue as directed in recipe.