Preheat Oven:

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

Make the Dough:

In a large bowl, cream together the butter, peanut butter, granulated sugar, and brown sugar until light and fluffy. Beat in the egg and vanilla extract.

Combine Dry Ingredients:

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

Shape the Cookies:

Scoop tablespoon-sized portions of dough and roll them into balls. Roll each ball in granulated sugar to coat, then place them on the prepared baking sheets about 2 inches apart.

Bake:

Bake for 8-10 minutes, or until the edges are lightly golden but the centers are still soft.

Add the Chocolate Kiss:

Immediately after removing the cookies from the oven, press a chocolate kiss into the center of each cookie. The cookies will crack slightly—this is normal.

Cool and Enjoy:

Let the cookies cool on the baking sheet for a few minutes, then transfer them to a cooling rack to set.