Craquelin
Craquelin is a type of Belgian brioche that is filled with nib sugar. Sugar pieces are flavored with orange, lemon, vanilla, or almond essence, then inserted into the dough before cooking. They melt and cool, leaving gaps encrusted in sugar. The craquelin dough will have a brioche dough overlay to prevent sugar protrusion. Note that this is different from choux au craquelin, which are mini cream puffs with crackly tops.
