Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, combine the peanut butter, granulated sugar, egg, and baking soda. Mix until smooth and well combined.
Roll the dough into 1-inch balls and place them 2 inches apart on the prepared baking sheet.
Bake for 8 to 10 minutes, or until the edges are lightly browned.
Remove the baking sheet from the oven and immediately press one Hershey’s Kiss into the center of each cookie.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.