This is a recipe for piped cookies using rice flour. The ingredients are just four: egg whites, unsalted butter, brown sugar, and rice flour. Mix the butter and brown sugar together, then gradually add the egg whites, mixing carefully to prevent separation. Add the rice flour and mix until smooth, then put the mixture into a piping bag and pipe it onto a baking sheet in cute spiral shapes. Bake in a preheated oven at 170°C for 16 minutes to make delicious gluten-free cookies with a crunchy texture. Making sure to bake them thoroughly on both sides is key to a delicious result. The consistency of the dough is the key to successful piping.