Preheat oven to 350°F and line baking sheets with parchment paper.

In a large bowl, mix together the peanut butter, 1 cup sugar, egg, vanilla extract, baking soda, and salt until thoroughly combined.

Roll the dough into 1-inch balls, then roll each ball in the extra granulated sugar to coat.

Place the balls 2 inches apart on the prepared baking sheets.

Bake for 8-10 minutes until the edges are lightly golden and the tops are slightly cracked.

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

Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.