Prep your oven preheating the oven at 350 degree Fahrenheit.
In a large bowl, cream together all your butter, confectioners' sugar, flour, egg, baking powder, and salt until smooth. Add the peppermint extract and vanilla vanilla extract and mix until cookie dough is smooth.
Add in chopped Hershey's peppermint kisses and fold it into the cookie dough.
Portion out your cookie dough into 12 portions and shape it to a round ball. Place the cookies onto your non-stick cookie sheet. Space out the cookie dough at least one inch apart to prevent it from merging into each other when baked. Flatten the round cookie dough by using your hands to lightly press the cookie down.
Bake for 10 mins in your preheated oven. As soon as the cookies are done baking, take out your tray of cookies and add the Hershey's peppermint cookies on top of each cookie by pressing it down in the middle of cookie while it is still warm. Allow cookies to cool before eating.