Preheat & Prepare:Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Mix Dry Ingredients:In a large bowl, whisk together the flour, sugar, baking powder, and salt.
Cut in the Butter:Add the cold, cubed butter to the flour mixture. Use a pastry cutter or your fingertips to work the butter into the flour until it resembles coarse crumbs.
Combine Wet Ingredients:In a separate bowl, whisk together the heavy cream, egg, and vanilla extract until well combined.
Form the Dough:Gradually add the wet ingredients to the dry mixture, stirring gently with a spatula. If using add-ins (fruit, chocolate, or zest), fold them in now. The dough should be slightly sticky but manageable.
Shape the Scones:Lightly flour a clean surface and turn out the dough. Gently knead 3-4 times to bring it together. Pat it into a 1-inch thick disc, then cut into 8 wedges or use a round cutter for traditional scones.
Bake:Place the scones on the prepared baking sheet, spacing them apart. Brush the tops with a little extra heavy cream for a golden finish. Bake for 15-18 minutes or until the tops are lightly golden.
Cool & Serve:Let the scones cool slightly on a wire rack before serving. Enjoy warm with jam, butter, or clotted cream!