1. Preheat Your Oven: Start by preheating your oven to 350°F (175°C) to ensure even baking.
2. Cream the Butter and Sugar: In a large mixing bowl, cream together 1 cup of softened unsalted butter and 1 cup of superfine sugar until light and fluffy.
3. Add Eggs and Vanilla: Beat in 1 large egg and 1 egg yolk, then add 2 teaspoons of vanilla extract, mixing until combined.
4. Combine Dry Ingredients: In another bowl, whisk together 2 1/2 cups of all-purpose flour and 1/2 teaspoon of salt, then gradually add to the wet ingredients until a dough forms.
5. Roll Out the Dough: Roll out the dough to about 1/4 inch thick on a floured surface, then cut with a heart-shaped cookie cutter and place on a baking sheet lined with parchment paper.
6. Bake the Cookies: Bake for 8-10 minutes or until edges are lightly golden. Let cool on a cooling rack.
7. Prepare the Cinnamon Icing: In a medium bowl, combine 2 cups of powdered sugar, 1 teaspoon of cinnamon, 2 tablespoons of milk, 1/2 teaspoon of vanilla extract, and 2 teaspoons of light corn syrup. Mix until smooth and add red food coloring as desired.
8. Decorate the Cookies: Once cooled, decorate cookies with the cinnamon icing using a piping bag or sealant bag.
