I was in Mexicali these days, helping a friend of mine that is opening a bakery only a few steps from Calexico. He asked me to make some mexican conchas, even I am not mexican. I think the result was quite good. Pretty awesome!
Conchas consist on two doughs. The main dough is a Pain Bioché dough (enriched bread or lean brioche), and the cover is a combination of white shortening, flour and icing sugar in equal parts. Then you add the colour and the flavour that you want. We made Cocoa conchas and Matcha Tea conchas. Brown and green like the Ninja Turtles.