Mix together the flour, sugar, baking powder and salt.
Add blueberries and whipping cream; stirring gently.
Turn onto a floured surface and knead gently.
Form into a flat ball, 10 inches in diameter and about 1/2 inch thick.
Cut into 12 wedges.
Place on large baking sheet.
Brush with melted butter and sprinkle with powdered sugar.
Bake at 425° until lightly brown, approximately 25 minutes.