Bolo rei.  It's a typical cake consumed during the holidays, especially the Magis day, or as we call it, "Dia dos Reis".  Dia dos Reis, originally pagan, is much more important in Spain, than in Portugal.
<a href="//commons.wikimedia.org/wiki/User:Saoshyant" title="User:Saoshyant">Ivo Emanuel Gonçalves</a>
2007-01-06
<span class="int-own-work" lang="en">Own work</span>