Ingredients

• 1 1/2 cups sorghum flour
• 1 cup millet flour
• 1/2 cup tapioca starch
• 4 teaspoons baking powder
• 2 teaspoons xanthan gum
• 1 1/2 teaspoons baking soda
• 1 1/2 teaspoons salt
• 1/2 cup cold butter
• 1 cup milk
• 1 egg, beaten
• 1 tablespoon cider vinegar
• 2 tablespoons rice flour, or as needed

Instructions

1. Preheat oven to 350 degrees F (175 degrees C). Grease 1 baking sheet.
2. Whisk sorghum flour, millet flour, tapioca starch, baking powder, xanthan gum, baking soda, and salt together in a large bowl. Cut in butter with a pastry blender or 2 knives until there are no large pieces left.
3. Mix milk, egg, and vinegar together in a small bowl. Pour over flour and butter mixture; stir until dough comes together.
4. Dust a flat work surface with rice flour. Roll dough out to 1/2-inch thickness; cut into 15 biscuits with a biscuit cutter. Arrange biscuits on the baking sheet.
5. Bake in the preheated oven until the tops are golden brown, 15 to 20 minutes.