I had some of those yesterday! In Belgium you can buy similar ones, they are called Bastognekoeken.
Pic:
http://koekipedia.wikispaces.com/fil...1/bastogne.jpg
Recipe:
http://www.mijnreceptenboek.nl/recep...oeken-444.html 
In case you end up with a Bastognekoeken addiction:
http://www.facebook.com/group.php?gid=110998438438