In a liquid measuring cup add almond milk and white vinegar and let sit for 5 min then stir to make dairy free buttermilk.
In a large mixing bowl whisk together GF all purpose flour, brown rice flour, baking powder, baking soda, salt and xanthan gum.
Using a pastry cutter, cut butter into flour mixture until butter and flour are pea size in shape.
Using your hands or a wooden spatula, slowly mix in buttermilk mixture until well combined.
Flour your surface and roll out biscuit dough to roughly 1 inch in thickness.
Cut out round biscuit shape either using a round cutter or a glass in your kitchen.
Bake in oven for 15-20 minutes or until golden brown!
Notes
Make sure your butter is cold! Dairy free butter tends to warm more quickly than regular butter and I suggest put it in the freezer for 10 minutes prior to cutting into the flour mixture.