• 1 cup (2 sticks) unsalted butter, softened: For a rich, buttery base.
• 1 cup granulated sugar: Sweetens the dough.
• 1 large egg: Helps bind the ingredients together.
• 2 teaspoons vanilla extract: Enhances the flavor.
• 2 ¾ cups all-purpose flour: The structure of the cookies.
• 1 teaspoon baking powder: Gives a slight lift.
• ½ teaspoon salt: Balances the sweetness.
• 2 tablespoons unsalted butter, melted: To help the sugar stick.
• ¼ cup brown sugar: For a rich, caramel-like sweetness.
• 1 ½ teaspoons ground cinnamon: The star spice of the filling.
• ½ cup powdered sugar: For a sweet glaze.
• 1 tablespoon milk or cream: To thin the icing.
• ½ teaspoon vanilla extract: For extra flavor.
