01 -
Adjust the oven rack to the center position and preheat to 400°F. Line two baking pans with parchment paper.
02 -
In a large bowl, whisk together the flour, sugar, lemon zest, salt, baking powder, and baking soda.
03 -
Add the butter and cut with a pastry cutter or fork until the butter is the size of large peas.
04 -
In a measuring glass, whisk together the buttermilk and 1 egg.
05 -
Make a well in the middle of the flour mixture and add the liquid mixture. Mix until partially combined and gently fold in the blueberries.
06 -
Transfer the dough to a floured surface and divide into 2 equal parts. Knead each into 3/4-inch thick, 6-inch diameter rounds. Cut each round into 8 wedges and place on the prepared baking pans. Space them 2 inches apart.
07 -
In a small bowl, combine the remaining egg with 1 teaspoon of water. Brush over the scones.
08 -
Bake for 12 to 15 minutes or until lightly browned.
09 -
In a small bowl, combine powdered sugar, crushed and sifted blueberries, and lemon juice. Stir with a fork until smooth and thick. Adjust consistency with more powdered sugar or lemon juice if needed.
10 -
Drizzle or dip each scone with the glaze. Let set before serving.