In a large mixing bowl, combine sugar and lemon zest. Using your hands, spoon or whisk, rub zest and sugar together until it resembles course sand.
½ cup (100 g) granulated sugar, 2 lemons zested
Whisk the flour, baking powder and salt into the lemon sugar mixture. Grate in the frozen butter, stopping every 2-3 tablespoon to lightly toss and coat the grated butter in the flour.
2 cups (240 g) all purpose flour, 2½ teaspoon baking powder, ½ teaspoon salt, 8 tablespoon (113 g) unsalted butter, frozen or very cold
When all the butter has been grated in, use a pastry cutter or your fingers to work the butter into the flour mixture until the butter is fully incorporated and the mixture resembles coarse sand with some larger pieces. This is similar to making a pie crust.
In a separate bowl, lightly beat an egg. Then whisk in the heavy cream, lemon juice and vanilla extract until well combined.
½ cup (118 ml) cold heavy cream, 1 large egg (US), lightly beaten, 2 tablespoon lemon juice, 2 teaspoon (10 ml) vanilla extract
Form a little well in the center of the flour and butter mixture. Pour ½ of the wet ingredients into the dry and gently incorporate. Repeat with the remaining wet ingredients into the dough.
Fold in the blueberries. Mix until the dough just comes together. There should be a few stray pieces of the dough.
1¼ cups (210 g) fresh or frozen blueberries
Transfer the lemon scone dough onto a lightly floured surface and gently shape the dough into a ball. Gently knead the scone dough by pressing down on the dough from middle to edges to form a disk. Fold in half. Repeat gently pressing the dough back into a round disk. Shape into a 8 - inch disk.
Place the disk onto a parchment lined baking sheet or plate to chill in the freezer for 30 - 40 minutes. While the scones chill in the freezer, preheat the oven to 400 F (204 C).
Remove the scones from the freezer and cut into 6 - 8 wedges using a dough scraper or long sharp knife. Space the scones about 2 - inches apart on a lined baking sheet. Brush scones with the heavy cream.
Bake in the oven at 400 F (204 C) for 18 - 22 minutes. Scones should be nicely golden brown and will be very fragrant. Allow scones to cool for 3 - 4 minutes on the baking sheet before transferring them to a cooling rack.
Make the best blueberry scones even better by topping them with a lemon glaze. Mix powdered sugar and lemon juice to your desired consistency. Then drizzle the lemon glaze on the scones and enjoy!
1 cup (120 g) powdered sugar, 2-3 tablespoon (30 - 45 ml) lemon juice