Preheat the oven to 350 degrees Fahrenheit. Line two cookie sheets with Gefen Parchment Paper. Set aside.

In a bowl, stir together the potato starch, brown rice and sweet rice and tapicoa flours, xanthan gum and salt. Set aside.

In the bowl of an electric mixer fitted with the paddle attachment, beat margarine and sugar together for two minutes or until somewhat combined. Add the egg and vanilla; mix for one minute.

Add the dry ingredients, mixing until well blended. If the dough is sticky, flour the baking surface and rolling pin with some sweet rice flour.

Divide the dough in half. Roll the dough, one piece at a time, between two pieces of parchment paper to a quarter-inch thickness.

Using Chanukah cookie cutters (or working freehand), cut out desired shapes. Transfer to prepared baking sheets.

Bake in the center of the preheated oven for 17 to 18 minutes or until lightly golden. Remove the pans to racks to cool completely. Decorate as desired.