Dry Ingredients: Combine 2 cups 1-to-1 gluten-free flour, 2 tablespoons coconut sugar, 3 teaspoons baking powder, 1 teaspoon kosher salt, ½ teaspoon baking soda and ¼ teaspoon xanthan gum in a medium mixing bowl.
Cut In Butter: Slice or cube ½ cup cold butter and add to the bowl of dry ingredients. Cut in the butter with a fork or pastry blender until coarse and pebbly.
Add Wet Ingredients: In a small bowl, combine 1 egg and ⅔ cup unsweetened almond milk. Pour into dry ingredients and mix until just moist. Spread into a well-greased 8x8 square baking dish; build up edges a bit. Sprinkle the top with 1 tablespoon organic cane sugar.
Bake: Move to the oven to bake for 15 minutes (middle rack). Remove and set on cooling rack and let cool slightly.