Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a mixing bowl, whisk together the flour, baking powder, sugar, and salt.

Cut in the cold butter using a pastry cutter until the mixture resembles coarse crumbs.

In another bowl, whisk together the egg, heavy cream, and lemon zest.

Pour the wet ingredients into the dry ingredients and mix until just combined. Gently fold in the blueberries.

Turn the dough onto a floured surface and shape it into a circle about 1 inch thick.

Cut the circle into 8 wedges and place them on the prepared baking sheet.

Bake for 15-20 minutes or until golden brown.

Allow to cool slightly before serving.