Cream the shortening with the sugar.
Add egg replacer.
In separate bowl mix flour, xanthan, baking powder, baking soda, and salt. Stir in orange zest and orange juice until mixture is crumbly.
Add flour mixture to creamed shortening and mix slowly.
Chill in fridge for 30 minutes.
Roll scant Tablespoonfuls of dough into balls and place on parchment lined cookie sheets.
Bake at 350 for 10 minutes and let cool on cookie sheets for 5 minutes before removing to wire rack.
Mix the powdered sugar with orange juice until the consistency is just right for drizzling on top of cookies warm cookies. Top with tiny bits of grated orange zest.
I never measure the ingredients for the glaze, I just pour and stir until it looks just right. You'll have to experiment.
You'll notice that if I bake it, Prince Charming will glaze it. He insists on glazing everything!