Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a 9 inch round cake pan.

Step 2

Combine the rice flour, tapioca flour, sugar, baking soda, baking powder, and salt in a large bowl. In a separate bowl, whisk together egg and buttermilk . Make a well in the center of the dry ingredients and pour in the wet. Stir just until the dry ingredients are moistened. Pour into the cake pan.

Step 3

Bake for 65 minutes in the preheated oven, or until a toothpick inserted into the center comes out clean. Cool on a wire rack, for 10 minutes before removing from the pan. Wrap bread in plastic wrap or aluminum foil and let stand overnight for the best flavor.