Pre-heat oven to 375.
Lightly grease your cookie sheets or use silicone mats.
In a small mixing bowl, thoroughly combine flour, baking soda, and salt.
In a large mixing bowl, cream the butter, peanut butter, and brown sugar with a mixer.
Mix in the egg and vanilla.
Add the flour mixture into the sugar mixture. Mix by hand until combined.
Roll the dough into rounded teaspoon size balls. Then roll in white granulated sugar before placing on cookie sheet.
Bake for 9-10 minutes or until cookies have puffed up and are golden brown.
Immediately upon removal from oven, top each cookie with a Hershey Kiss, pressing down lightly - the cookie will crack. Let sit for 1-2 minutes.
Move cookies from pan to wire racks. Allow to cool for at least 10 minutes.