Preheat your oven: Begin by preheating your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Mix dry ingredients: In a large mixing bowl, combine the flour, sugar, baking powder, and salt. Whisk them together to ensure they are evenly distributed.
Add the butter: Cut in the chilled butter using a pastry cutter or your fingertips until the mixture resembles coarse crumbs.
Combine wet ingredients: In a separate bowl, whisk together the heavy cream and egg. Gradually add this mixture to the dry ingredients, stirring gently until just combined.
Fold in blueberries: Carefully fold in the fresh blueberries, ensuring they are evenly distributed without over-mixing.
Form the dough: Turn the dough onto a floured surface and gently knead it a few times until it comes together. Shape it into a circle about 1 inch thick.
Cut the scones: Use a knife or a pizza cutter to slice the dough into 8 wedges, then transfer them to the prepared baking sheet.
Add egg wash (optional): For a golden finish, brush the tops with beaten egg.
Bake: Place the scones in the oven and bake for 15-20 minutes until they are golden brown and a toothpick inserted comes out clean.
Cool and enjoy: Allow the scones to cool slightly on a wire rack before serving them warm.