Step 1: Prepare the Dough

1. Cream the Butter and Sugars:
   In a large mixing bowl, use an electric hand or stand mixer to beat the softened butter, granulated sugar, and brown sugar together until light and fluffy (about 2–3 minutes). This ensures the base of your cookie is creamy and well-aerated.
2. Add Peanut Butter and Wet Ingredients:
   Beat in the peanut butter until well combined. Then add the egg and vanilla extract, mixing until fully incorporated. Scrape down the sides of the bowl as needed.
3. Combine the Dry Ingredients:
   In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, mixing on low speed until a cohesive dough forms.

Step 2: Chill the Dough

1. Cover the bowl with plastic wrap or transfer the dough to an airtight container.
2. Refrigerate for at least 30 minutes to firm up the dough and make it easier to roll.

Step 3: Preheat Oven and Shape the Cookies

1. Preheat the Oven: Set your oven to 375°F (190°C). Line baking sheets with parchment paper or silicone mats for an even bake and easy cleanup.
2. Shape the Dough: Roll the chilled dough into 1-inch balls. Ensure uniform size for even baking.
3. Coat the Dough Balls: Roll each ball in granulated sugar, covering the entire surface.

Step 4: Bake the Cookies

1. Place the coated dough balls onto the prepared baking sheets, spacing them about 2 inches apart.
2. Bake for 8–10 minutes, or until the edges are lightly golden. The centers may look soft, which is perfect for chewy cookies.

Step 5: Add the Hershey’s Kiss

1. Remove the cookies from the oven and immediately press one Hershey’s Kiss into the center of each cookie. The warm cookie will crack slightly around the edges, giving it the classic look.
2. Let the cookies cool on the baking sheet for about 5 minutes before transferring to a wire rack to cool completely. The Hershey’s Kisses will set as they cool.