One snack I really like from the Netherlands is speculaas. I took home a box that said “Dutch spiced cookies”. They were traditionally sold around Sinterklaas (December 5) but thankfully they are now sold year round. I bought my supply from Albert Heijn. The wikipedia link mentions how they have images stamped on the front (as you can mostly see below), while the backs are flat.
The cookies above are sadly the last bits of cookie I have left from the rather large box I bought. However, in my opinion the trick to making this snack taste extra good is allowing them to get a bit old. Open up the plastic, and close the box again. Let them get a bit softer with age. It’s also very good with the Dutch pickwick tea!