5 tablespoons (70 g) unsalted butter, at room temperature
1 egg (60 g, out of shell) at room temperature, beaten
Royal icing, for decorating (optional)
Preheat your oven to 325°F. Line rimmed baking sheets with unbleached parchment paper and set them aside.
In a large bowl, place the flour blend, xanthan gum, cornstarch, baking soda, cinnamon, ginger, salt and granulated sugar, and whisk to combine well. Add the brown sugar, and whisk once more to combine, working out any lumps in the brown sugar. Create a well in the center of the dry ingredients, and add the molasses, honey, vanilla, butter and egg, mixing to combine after each addition. The dough will be thick and smooth, and somewhat sticky to the touch.