Instructions

1. Prepare your workspace by preheating the oven to 350°F (175°C) and lining two baking sheets with parchment paper.
2. In a medium bowl, sift together the all-purpose flour and unsweetened cocoa powder. Whisk to ensure even distribution of ingredients.
3. In a large mixing bowl, cream the softened butter and sugar together using an electric mixer until light and fluffy, approximately 3-4 minutes.
4. Add the egg and vanilla extract to the butter mixture, beating until well combined and smooth.
5. Gradually add the dry ingredients to the wet mixture, mixing on low speed until a soft dough forms. Be careful not to overmix.
6. Roll the dough out on a lightly floured surface to about 1/4 inch thickness.
7. Use a lip-shaped cookie cutter to cut out cookie shapes. If you don't have a lip-shaped cutter, you can use a heart cutter and slightly modify the shape.
8. Carefully transfer the cut-out cookies to the prepared baking sheets, spacing them about 1 inch apart.
9. Bake in the preheated oven for 12-15 minutes, or until the edges are slightly firm and the cookies appear set.
10. Remove from the oven and let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
11. Once cooled, decorate the cookies by placing conversation hearts in the center of each cookie, gently pressing them into the surface.
12. For an optional decorative touch, you can dust the edges of the cookies with powdered sugar or create a light glaze to enhance their appearance.
13. Store the cookies in an airtight container at room temperature for up to 5 days.