Sugar & nut (when you've cut the dough with the cookie cutter, brush them with egg white and sprinkle them with a mix of roughly chopped nut and granulated sugar, place them on the baking tray and bake them).
Thumbprint (form small balls of the dough and sprinkle them with a little bit of granulated sugar, make a small indentation with your thumb in each cookie, fill them with jam and bake them).
Linzer (once you've rolled out the dough, you have to cut the top and the bottom: for the bottom, cut out circles, for the top, cut out the circles' center with a smaller heart/star-shaped cutter. Once baked, spread a teaspoon of jam over the bottom, sprinkle the tops with powdered sugar and sandwich them together).
Chocolate & candied orange (glaze the baked cookies with chocolate and sprinkle them with finely chopped candied orange).
Lemon & rosemary (glaze the baked cookies with a mix of lemon juice and powdered sugar (2-3 tbsp of lemon juice and 3-4 tbsp. powdered sugar) and sprinkle with finely chopped fresh rosemary).
You can create an infinite number of glazes with powdered sugar and food colouring, and decorate the cookies with the Christmas decoration you want.