Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.

Unwrap the Hershey Kisses and set them aside in a small bowl.

In a large mixing bowl, combine the sugar and softened butter, beat until creamy and fluffy. Add in the egg and vanilla extract, mix until well incorporated.

In a separate bowl, whisk together the all-purpose flour and baking soda. Gradually add this to your creamy base, mixing until a smooth dough forms.

Shape the dough into roughly 1-inch balls, roll in bright colored sanding sugar, and place on the prepared baking sheet.

Bake in the preheated oven for about 7 minutes until edges are set and centers are slightly soft.

Remove from oven and immediately press an unwrapped Hershey Kiss into the center of each warm cookie.

Let cool on baking sheet for a few minutes before transferring to a wire rack to cool completely.