Preheat the oven to 350 degrees F.
In a large bowl, mix together the gluten-free baking flour, powdered sugar, baking powder, salt, and lemon zest.
In another bowl, use a mixer to cream the butter. Slowly mix in the maple syrup, vanilla, and lemon juice.
Add the wet ingredients to the dry ingredients and mix well to form a cookie dough.
Roll out your cookie dough and cut out desired shapes.
Place each cookie on a baking sheet lined with parchment paper and bake for 10-12 minutes.
While the cookies are baking, make the glaze by mixing together all the ingredients.
When the cookies are done, let them cool before glazing and sprinkling with the lemon zest. Enjoy!