- Preheat the oven to 350 degrees. 
- Mix together the butter, sugar and brown sugar in a large bowl till creamy. 
- Add in the egg and vanilla and mix till incorporated. 
- In another bowl add the baking soda, baking powder, salt, flour and graham cracker crumbs. 
- Add the flour mixture to the wet mixture and stir together till a soft dough is formed. 
- Scoop 1 inch sized balls onto a cookie sheet lined with parchment or a silicone liner. 
- Bake cookies for about 7 minutes, until top is golden. 
- Cut marshmallows in half (scissors work great) and unwrap kisses. 
- Top each cookie with a marshmallow half with the sticky side down. 
- Return to the oven and bake for 1 to 1 1/2 minutes until marshmallow puffs up. 
- Remove from oven and top each marshmallow with a Hershey Kiss. 
- Allow cookies to rest on cookie sheet for 2-3 minutes, then move to a cooling rack to cool completely.