Preheat oven to 475°F. Line baking sheet with parchment.
In a large bowl, mix flour, sugar, baking powder, baking soda, salt, and lemon zest.
In a separate bowl, stir buttermilk and melted butter together, then add vanilla.
Pour wet ingredients into dry and stir until just combined. Gently fold in blueberries.
Drop scoops of dough onto baking sheet. Sprinkle with turbinado sugar.
Bake for 10–14 minutes, or until golden.
Cool slightly, then drizzle with lemon glaze. Enjoy!