Snickerdoodle Cupcakes

INGREDIENTS

• :
• 1½ cups all-purpose flour
• 1½ cups cake flour
• 1 tablespoon baking powder
• ½ teaspoon salt
• 1 tablespoon ground cinnamon
• 1 cup unsalted butter, at room temperature
• 1¾ cups granulated sugar
• 4 eggs, at room temperature
• 2 teaspoons vanilla extract
• 1¼ cups whole milk
• 1½ cups plus 2 tablespoons granulated sugar, divided
• 2/3 cup water
• 2 tablespoons light corn syrup
• 6 egg whites, at room temperature
• 2 tablespoons granulated sugar
• ½ teaspoon ground cinnamon