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

Cream together the softened unsalted butter, granulated sugar, light brown sugar, and creamy peanut butter using an electric mixer on medium speed for 2-3 minutes until light and fluffy. Mix in the egg and vanilla extract until smooth.

In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Gradually add this dry mixture to the wet ingredients, mixing gently until just combined.

Roll the dough into 1-inch balls and roll each ball in granulated sugar. Place on prepared baking sheets, leaving about 2 inches of space.

Bake for 10-12 minutes until edges are golden brown but centers are soft. Remove from oven.

Press a Hershey's Kiss into the center of each warm cookie immediately after removing from the oven.

Let the cookies cool on the sheets for about 5 minutes before transferring to a wire rack.