Low Fat Blueberry Scones

Bahan-bahan (8 porsi)

• 2 cups unbleached flour
• 1/4 cup sugar
• 1/4 tsp salt
• 1/2 tsp baking soda
• 1 tbsp baking powder
• 1/4 cup frozen butter (half stick )
• 3/4 cups 1% buttermilk
• 1 large egg
• 1 tsp vanilla
• 1 cup fresh blueberries (if frozen, thaw first)