Starbucks Petite Vanilla Scone Recipe - Food.com

Ingredients

• 2 cups all-purpose flour
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup sugar
• 5 tablespoons unsalted butter, cold, cut into pieces
• 1 cup regular full-fat sour cream
• 1 large egg yolk
• 2 teaspoons vanilla extract
• 1 1/2 cups powdered sugar
• water, as needed