Step One: Whisk the Dry Ingredients - In a large bowl, whisk together the flour, salt, xanthan gum, baking powder, and baking soda.
Add the Butter - Cut in the butter until it is in chunks about the size of a nickel.
Add Buttermilk and Honey - In a small bowl, mix together the buttermilk and honey. Pour it into the dry ingredients and mix together until the dough comes together. There should be only a few dry crumbs in the mixture.
Fold the Dough - Add the dough onto parchment paper that has been dusted with cornstarch. Using the paper, fold the dough over on itself eight times. Pat down to 1/2 inch in thickness between each fold.
Cut the Dough - After the last fold, pat the dough down to 1/2-3/4 inch. Using your biscuit cutter, cut out the biscuits until all the dough is used.
Chill the Biscuits - On a baking sheet lined with parchment paper place your biscuits. Put in the freezer while you preheat the oven to 425 degrees Fahrenheit.
Bale the Biscuits - Once the oven is preheated, take the biscuits out of the freezer and brush the tops with buttermilk. Bake them for 15 minutes, until the tops are golden brown. Serve the biscuits warm