Well, I'm from southeastern Brazil as
@Suyon, and the most popular dessert here is brigadeiro. It is a very simple recipe, only taking some 2 or 3 ingredients (condensed milk, powered cocoa and milk cream)
I think "bolo de cenoura" (carrot cake) is also a very popular dessert here, with the batter made out of carrot, flour, oil and eggs and the frosting made out of brigadeiro.
There are other traditional brazilian desserts that are really popular (bolinho de chuva, pรฉ-de-moleque, arroz-doce, pamonha), but people don't do it around here as much.