To mix the dough by hand: Combine the gluten-free flour, sugar, baking powder, and salt in a large bowl. Whisk to combine.
Add the butter and stir to coat it with the gluten-free flour mixture. Quickly cut in the butter with a pastry cutter or your fingers. Look for the mixture to look coarse with small and large pieces of butter throughout the flour. Proceed to step three.
Food processor directions: Place the gluten-free flour, sugar, baking powder, and salt in the bowl of a food processor. Pulse food processor, about 20 seconds each, to combine.
Remove the lid and add the butter. Pulse the food processor, about five times, to incorporate the butter into the gluten-free flour.
Preheat oven to 375°F. Remove the pan from the refrigerator and remove the plastic wrap. Cut the dough into 8 triangles. Gently separate the scones. (For round scones, see the variations in the notes below.) Sprinkle with sugar. (optional.)
Butter. Replace the butter with an equal amount of dairy-free baking spread or coconut oil. If using coconut oil, you want it firm but not brittle.
Buttermilk or cream. Replace the buttermilk with full-fat coconut milk. Whisk the coconut milk until smooth before using.
Egg-Free Variation.
Replace the egg with a ¼ cup of additional buttermilk, cream, or coconut milk.
Blueberry Scones. Stir 1 cup of fresh blueberries into the dough.
Lemon Scones. Add the zest of one large lemon.
Chocolate chip scones. Add 1 dark or milk chocolate chips. Top scones with a sprinkle of coarse sugar.
Pat the dough into an 8-inch square. Cut the dough with a small round cookie cutter. Don’t twist the cutter. Doing this seals the edges and the scones won’t rise as high. You can gently knead the remaining and cut into rounds. Bake time depends on the size of the cutter you use. A 3-inch scone takes about 15 minutes to bake.