Preheat oven to 375°F and line two baking sheets with parchment paper

Unwrap all chocolate kisses and set aside in a bowl

Place one-third cup granulated sugar in a small bowl for rolling cookies

Whisk together flour, baking soda, and salt in a medium bowl

Beat butter, peanut butter, granulated sugar, and brown sugar with an electric mixer for three minutes until light and fluffy

Add egg and vanilla extract to the butter mixture and beat until combined

Add flour mixture to wet ingredients and mix on low speed just until no flour streaks remain

Scoop one tablespoon of dough and roll into a ball between your palms

Roll each dough ball in the sugar to coat completely

Place sugar-coated balls on prepared baking sheets two inches apart

Bake for 8 to 10 minutes until edges are set but centers still look slightly soft

Remove from oven and immediately press one chocolate kiss firmly into the center of each cookie

Let cookies cool on baking sheet for five minutes

Transfer cookies to a cooling rack to cool completely

Repeat with remaining dough