Leche flan had its beginnings from Creme Caramel, which is of French origin. Creme Caramel was very popular in dessert menus in Europe, large because of their convenience - restauranteurs are able to prepare a lot in advance and refrigerate them until they are needed.
In the Philippines, our Leche Flan (literally, milk flan) is a Spanish version that placed emphasis on more egg yolks (12 egg yolks in one batch!). It is a staple in all celebrations.
I found another version of the Leche Flan from Tsoko.Nut. They took the caramel top and put it over the (a bit dry) sponge cake.
Leche Flan cake from Tsoko.Nut, Php 55 per slice
2/F SM Makati, Ayala Center, EDSA
Makati City, Metro Manila
Tel: 632 816 4305