In a mixing bowl, whisk together flour, baking powder, salt, and sugar. Cut in cold, cubed butter using a pastry cutter or your fingertips until the mixture resembles coarse crumbs. Stir in any optional flavorings, such as vanilla extract or dried fruit.
Pour in the milk gradually, stirring until a soft dough forms. Be careful not to overmix, as this can result in tough scones.
Turn the dough out onto a lightly floured surface and gently pat it into a circle about 1 inch thick. Use a sharp knife or a pastry cutter to divide the dough into wedges or use a biscuit cutter to cut out rounds.
Preheat your air fryer to 350°F (180°C) for a few minutes.
Place the shaped scones in a single layer in the air fryer basket, leaving some space between each one to allow for air circulation.
Cook the scones in the preheated air fryer for about 8 to 12 minutes, or until they are golden brown and cooked through. The exact cooking time may vary depending on the size and thickness of your scones and the specific model of your air fryer.
Once cooked, transfer the scones to a wire rack to cool slightly before serving. Enjoy them warm with clotted cream and jam, or simply on their own.