French love their pastries and chocolate, even more so around Christmas.
There are chocolate boxes piled up high everywhere in stores—Lindt, Kinder, etc. are among the favourite. People also love fine chocolate and the windows at the chocolatiers are like out of a Charlie and the Chocolate Factory movie.
Pastries are always a hit, from simple viennoiseries (pain au chocolat, pain aux raisins, croissant, etc.) to elaborate layered cakes. Traditionally, French eat a bûche de Noël (yule log) at Christmas, a cake made from a genoise or other sponge cake, generally baked in a large, shallow Swiss roll pan, frosted, rolled to form a cylinder, and frosted again on the outside.
Other popular food at Christmas markets are ”fun fair” foods, such as waffles (with Nutella, bien sûr), bretzels and beignets (donuts), nougat and gingerbread.
You can see the complete set of pictures on Flickr.