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 large mixing bowl, combine the all-purpose flour, granulated sugar, baking powder, and sea salt. Whisk them together thoroughly to ensure even distribution.
Take the chilled, cubed butter and add it to the flour mixture. Using a pastry cutter or your fingertips, work the butter into the flour until the mixture resembles coarse crumbs with small pea-sized pieces.
Carefully fold in the fresh blueberries and the zest of one lemon, ensuring they are evenly dispersed throughout the mixture without overly mashing the berries.
In a separate medium bowl, whisk together the heavy cream, large egg, pure vanilla extract, and freshly squeezed lemon juice until the mixture is smooth and well-combined.
Gently pour the wet ingredients into the dry ingredients, stirring just until everything is combined. Take care not to overmix, as this will lead to tough scones.
Lightly flour a clean surface and transfer the dough onto it. Gently knead the dough about 3 to 4 times just until it holds together. Shape the dough into a circle that is approximately 1-inch thick.
Using a sharp knife or a pizza cutter, cut the dough into 8 equal wedges. Carefully place each wedge onto the prepared baking sheet, ensuring there is space between each scone for even baking.
Bake the scones in your preheated oven for 15-20 minutes. They are ready when the tops are a beautiful golden brown and a toothpick inserted into the center comes out clean.
Once baked, remove the scones from the oven and allow them to cool slightly on a wire rack before serving. This will enhance their texture!
Notes
Dust the warm scones with powdered sugar and serve with clotted cream or lemon curd.