In a bowl, combine the dry ingredients (flour, baking soda, and salt), set aside.
In a large bowl, using a hand or stand mixer, cream the butter for 1 minute. Add the sugars and beat for 1 minute. Scrape off the sides of the bowl with a spatula.
Add the egg, peanut butter, and vanilla, and beat until well combined.
Add the dry ingredients to the wet ingredients, and mix until just combined. Cover with plastic wrap, and chill in the fridge for 30 minutes or overnight.
Preheat oven to 350°F/180°C.
Line baking 2 baking sheets with parchment paper, and set aside.
Divide the cookie dough into 1 tablespoon dough balls (use a small cookie scoop, or scales). Gently roll ball in granulated sugar to coat from all sides, and arrange on the baking sheets 2 inches apart.
Bake for 10 minutes the cookies will puff up and have cracked tops, remove from the oven and cool for 5-10 minutes (if you add the chocolates right away they will melt, so it’s recommend that you cool the cookies a little first, but not for too long as you don’t want them to set completely).
Press a chocolate kiss candy in the center of each cookie, and remove onto a cooling rack. If it’s very warm where you are working, then you can place the cookies in the freezer for 10 minutes - this will prevent the chocolate from melting.