Preheat and Prepare. Preheat your oven to 375°F. Line a baking sheet with parchment paper to prevent the scones from sticking.
Mix Dry Ingredients. In a large bowl, whisk together the all-purpose flour, sugar, baking powder, and salt until well combined.
Cut in the Butter. Add the cold butter to the dry ingredients. Use a pastry cutter or your fingertips to cut the butter into the flour until the mixture resembles coarse crumbs. This will ensure the scones are light and flaky.
Add the Wet Ingredients. In a separate bowl, whisk together the egg and milk (or cream). Add the wet ingredients to the dry mixture and stir gently with a spoon or spatula until the dough just begins to come together. Be careful not to overmix, as this will affect the texture.
Fold in the Blueberries. Gently fold the fresh blueberries into the dough. If you’re worried about the blueberries bursting, lightly dust them with flour before adding them to the dough.
Shape the Dough. Turn the dough onto a floured surface and shape it into a circle about 1-inch thick. Cut the dough into 8 wedges (like a pizza) or use a round cookie cutter for uniform scones.
Bake the Scones. Place the scones onto the prepared baking sheet and bake for 18-22 minutes, or until they’re golden brown on top and a toothpick inserted into the center comes out clean.
Cool and Serve. Allow the scones to cool on a wire rack for a few minutes before serving. You can drizzle them with a simple glaze made of powdered sugar and milk for a sweet finishing touch.