Brussels 2013 - Bruyerre Chocolates
Bruyerre is one of the top chocolatier in Belgium and you see there shops every where. They have one right at the Old Town Square - very convenient for visitors. The shop interior is quite quaint and cute - the better to draw in the tourists.
Bruyerre chocolates are delicious, but not cheap. A small box of half a dozen of the more premium pralines would easily cost 10 euros or more.
They even have a chocolatier on site making some of the chocolates on the spot. Forgot to ask whether they take customized orders.