Preheat your oven to 400°F (200°C).
Line your baking sheet with parchment paper.
This prevents sticking and ensures even baking.
Set everything aside while you prepare the dough.
Add flour, sugar, baking powder, and salt.
Whisk them together in your large bowl.
Make sure everything is well combined.
This ensures even distribution of leavening agents.
Add cold butter pieces to your flour mixture.
Use a pastry cutter or fork here.
Work until the mixture looks like coarse crumbs.
Small butter pieces create those flaky layers.
Don't overwork the dough at this stage.
Whisk cream, egg, and vanilla in a bowl.
Pour this mixture into your dry ingredients.
Stir gently until just combined together.
Add berries or chocolate chips if using.
The dough should look slightly shaggy.
Turn dough onto a floured surface gently.
Pat it into a circle about 3/4-inch thick.
Cut into 8 wedges with a sharp knife.
Or use a biscuit cutter for round scones.
Place them on your prepared baking sheet.
Brush tops with a beaten egg mixture.
This creates a beautiful golden color.
Sprinkle with sugar if you like sweetness.
Bake for 15-18 minutes until golden brown.
Let them cool for 5 minutes before serving.