In a large bowl, beat the softened butter, granulated sugar, and brown sugar together until light and fluffy.

Mix in the egg and vanilla extract until well combined.

In a separate bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry ingredients to the wet mixture, stirring until just combined.

Fold in the chocolate chips until evenly distributed.

Cover the dough and refrigerate for 30 minutes to help the cookies hold their shape.

Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.

Roll out the dough to about 1/4-inch thickness on a lightly floured surface.

Use a heart-shaped cookie cutter to cut out cookies, re-rolling scraps as needed.

Place the cookies on the prepared baking sheet, spacing them 2 inches apart.

Bake for 8-10 minutes or until the edges are lightly golden.

Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.

Optional: Sprinkle with colored sugar or drizzle with melted chocolate for decoration.