In a stand mixer add brown sugar, butter, and flaxseed meal mixture
Cream mixture until fluffy.
Scrape the sides of the bowl.
In a medium sized bowl combine brown rice flour, sorghum, potato starch, ground cinnamon, baking soda, sea salt, and xanthum gum.
Mix all dry ingredients until fully combined.
Add dry ingredients to wet ingredients a little at a time until fully combined.
Scrape the bottom and sides of bowl.
Refrigerate for at least two hours.
Preheat your oven to 350 degrees F.
Line a cookie sheet with parchment paper or a silpat.
Using a small cookie scooper, scoop dough onto cookie sheet.
Bake for 11 minutes or until golden brown.
Let cookies cool fully on a wire rack.
Using a small bowl add powdered sugar, and milk.
Whisk mixture until smooth and runny.
Using a piping bag or a spoon frost cooled cookies.