Recipe Card

In a large bowl, whisk together the flour, sugar, lemon zest, baking powder, and salt. Shred the frozen butter and blend it into the flour mixture.
In a separate bowl, whisk together the heavy cream, egg, and vanilla extract. Drizzle it over the flour mixture and add the blueberries. Mix gently.
Shape the dough into an 8-inch disc and cut into 8 wedges. Brush with cream and refrigerate for at least 15 minutes.
Preheat the oven to 400°F (204°C) and bake the scones for 22–25 minutes until golden.
Cool the scones and drizzle with an icing made from confectioners' sugar and lemon juice.