Step 1: Make the Dough

1. In a large bowl, cream together the butter and sugar until light and fluffy.
2. Add the egg and vanilla extract, mixing until smooth.
3. In a separate bowl, whisk together the flour, cinnamon, and salt.
4. Gradually add the dry ingredients to the wet mixture, stirring just until the dough comes together.
5. Form the dough into a disc, wrap it in plastic wrap, and refrigerate for at least 1 hour.

Step 2: Roll & Cut the Cookies

6. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
7. Roll out the chilled dough on a lightly floured surface to about 1/4-inch thickness.
8. Use heart-shaped cookie cutters to cut out your cookies and place them on the prepared baking sheet.

Step 3: Decorate & Bake

9. Sprinkle the cookies with cinnamon sugar before baking if you like a little extra sweetness.
10. Bake for 10-12 minutes, or until the edges are lightly golden.
11. Let the cookies cool on the baking sheet for 5 minutes, then transfer them to a wire rack to cool completely.

Step 4: Add Final Touches

12. Once cooled, decorate with icing, sprinkles, or a simple powdered sugar glaze for an extra festive touch.