Nonstick cooking spray
2 cups all-purpose flour
4 teaspoons baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
1/8 teaspoon ground cinnamon
1/2 cup unsalted butter, softened
1 1/4 cups granulated sugar
2 eggs
3/4 cup dairy sour cream
1 teaspoon pure vanilla extract
1/3 cup milk
3 ounces bittersweet chocolate, melted and cooled
1/2 cup creamy peanut butter
1 recipe Salted Caramel Glaze, recipe below
Sea salt (optional)