Good-Cooking - Black Raspberry Buttermilk Scones

Ingredients

• 1 1/2 cups all-purpose flour
• 1 1/2 cups cake flour
• 1 tablespoon baking powder
• 1 teaspoon fine salt
• 16 tablespoons unsalted butter, cut into 1-inch pieces
• 1 cup buttermilk
• 1 tablespoon lemon zest
• 1/2 cup black raspberry jam
• 1 1/2 teaspoons sugar