Butterscotch Pecan Scones

Bahan-bahan (8 porsi)

• ⅔ cup pecans
• ½ cup heavy cream, (plus more if necessary)
• 1 large egg
• 1 teaspoon vanilla extract
• 2 cups cake flour, (spooned into measuring cup and leveled-off (see note on substitution))
• ½ teaspoon salt
• 1 tablespoon baking powder
• 3 tablespoons (packed) dark brown sugar
• 6 tablespoons cold unsalted butter, (cut into ½-inch (13-mm) pieces)
• ⅔ cup butterscotch chips, (best quality such as Guittard)
• Demerara sugar ((also called raw sugar or turbinado), for sprinkling)