Preheat the oven to 400°F (200°C)
Line a baking sheet with parchment paper
Mix 2 cups all-purpose flour, 1/4 cup sugar, 1 tablespoon baking powder, and 1/2 teaspoon salt
Cut in 1/2 cup cold butter until the mixture resembles coarse crumbs
Stir in 1/2 cup milk or cream and 1 egg until just combined
Add optional mix-ins such as raisins, chocolate chips, or berries
Turn the dough onto a lightly floured surface
Gently pat the dough into a 1-inch-thick circle
Cut into wedges or use a round cutter
Place the scones on the prepared baking sheet
Brush the tops with milk or cream
Bake for 15 to 20 minutes until golden brown
Cool slightly before serving