Sándwiches de miga, also called rafaelitos or simply sánguches, are popular food items in Argentina, Uruguay, and Chile, where they are often consumed at parties.

The toasted version is common bar food in both countries, known locally as tostados or carlitos in Argentina, and sándwiches calientes in Uruguay.

The sándwiches de miga resemble the Italian tramezzino and the English cucumber sandwich for afternoon tea, which is a typical tea-time food.

[2] The Buenos Aires newspaper Clarín, however, suggests that the sandwich was actually invented by local bakers at the Confitería Ideal, who had made a sandwich with a recreated English-style bread to satisfy a group of homesick British engineers who used to frequent their establishment during the early part of the twentieth century.

They are filled with thinly sliced cold cuts (especially ham), hard-boiled eggs, cheese, tomatoes, bell peppers, tuna, lettuce, and sometimes other vegetables such as asparagus.