Begin by preheating your oven to 400°F (200°C). Prepare a baking sheet by lining it with parchment paper for easy cleanup.
In a spacious mixing bowl, mix together the all-purpose flour, granulated sugar, baking powder, and salt. Use a whisk to ensure the ingredients are evenly combined and aerated.
Add the cold, cubed unsalted butter to the dry mixture. Utilize a pastry cutter or your fingertips to work the butter into the flour until the mixture resembles coarse crumbs.
Carefully fold in the fresh blueberries and lemon zest, using a gentle hand to preserve the shape of the berries.
In a separate bowl, whisk together the heavy cream, large egg, and vanilla extract until fully combined and smooth.
Pour the wet mixture into the dry ingredients. Stir gently until just combined; avoid overmixing.
Turn your dough out onto a lightly floured surface. With a gentle touch, shape it into a circle approximately 1 inch thick.
Using a sharp knife, cut the circle into 8 wedges and transfer each piece to the prepared baking sheet.
Bake the scones in your preheated oven for 15-18 minutes, or until they turn a lovely golden brown on top.
Once baked, allow the scones to cool on a wire rack. Brush the tops with melted butter and sprinkle a little sugar over them for a delightful shine.
Notes
Serve warm with powdered sugar or lemon glaze for an extra treat.