Bitterkoekjes are traditional Dutch almond cookies with a flavor that is reminiscent of the Italian amaretti, although bitterkoekjes have a chewier interior. The cookies consist of almond paste, sugar, and eggs, similar to macarons, so making them takes a bit of practice and knowledge as they can be quite tricky to prepare.

Even though they can be made throughout the year, bitterkoekjes are especially popular during the festive Christmas season in the Netherlands.