In a large mixing bowl, whisk together the gluten-free flour blend, baking powder, salt, and baking soda.
Add the cold, cubed butter to the dry ingredients and cut it in using a pastry cutter or your fingers until the mixture resembles coarse crumbs.
Pour in the buttermilk and stir until just combined. Do not overmix.
Turn the dough out onto a lightly floured surface and pat it into a rectangle about 1-inch thick. Fold the dough in half and pat it down again. Repeat this process 2-3 times to create layers.
Cut out biscuits using a round cutter and place them on a baking sheet lined with parchment paper.
Bake for 12-15 minutes, or until the biscuits are golden brown on top.
Remove from the oven and let cool slightly before serving.