Preheat the Oven
Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.

Make the Dough
In a large mixing bowl, cream the butter, granulated sugar, and brown sugar until light and fluffy. Add the eggs and vanilla extract, mixing until well combined.

Mix the Dry Ingredients
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, stirring until a soft dough forms.

Roll in Sugar
Scoop tablespoon-sized portions of dough and roll them into balls. Coat each ball with pastel-colored sanding sugar.

Bake the Cookies
Arrange the dough balls on the prepared baking sheets, spacing them 2 inches apart. Bake for 8-10 minutes until the edges are set and lightly golden.

Add the Chocolate Kiss
Remove from the oven and immediately press a chocolate kiss into the center of each cookie. Let them cool on the baking sheet for 5 minutes before transferring to a wire rack.