Preheat oven to 400°F. Whisk together flour, sugar, baking powder, and salt in a large bowl.

Cut in butter, then add cream and beaten egg.

Work dough until well combined. Incorporate blueberries gently. Do not overwork the dough.

Turn out dough on floured surface, and flatten into even, circular shape.

Cut dough into 8 pieces and place on baking sheet. Sprinkle with white sugar, then bake for 25 minutes