Preheat the oven to 400°F and line a baking sheet with parchment paper.
In a large mixing bowl, add your dry ingredients: flour, sugar, baking powder, and salt, and whisk to combine. Add the diced butter and cut it into the flour mixture using a pastry cutter until pea-sized butter crumbs form. Gently fold in the blueberries. Refrigerate while preparing the liquid ingredients.
In a small bowl, whisk together the cream, egg, and vanilla until well blended. Pour the cream mixture into your flour mixture and use a spatula to fold until just moistened. Do not over-mix. If the dough seems too dry, add another tablespoon of cream. If it’s too wet, sprinkle with flour.
Transfer your dough onto a clean work surface and work it into a ball of dough then flatten it into a 1-inch thick and 7-inch wide disk. Cut into 8 equal wedges, making sure to cut straight down without using a sawing motion.
Set scones onto your lined baking sheet, keeping them at least an inch apart. Brush the tops with some cream and sprinkle generously with coarse sugar. Refrigerate the scones for 15 minutes before baking.
Bake for 20-23 minutes or until the tops are golden brown and the centers are baked through. Remove from the oven and cool completely on a cooling rack. Finally, drizzle with glaze.
In a small bowl, combine powdered sugar, lemon zest, and lemon juice. Stir until well blended. The glaze should be drizzling consistency. You can thicken it with more powdered sugar and thin it out with more lemon juice. Once the scones have cooled, drizzle with glaze.
