Preheat oven to 350 degrees.
Beat the butter and sugar in a mixer until combined and fluffy.
Add baking powder and salt and mix until just combined
Beat in the egg white, followed by the flour and orange zest. Mix only until combined.
Wrap cookie dough in plastic and place in the fridge for 20 minutes.
Using a small cookie scoopm scoop the dough into balls and roll in cane sugar.
Place on an ungreased cookie sheet and bake for 10-12 minutes. (Cookies will be very light in color even after baking. Don't over bake!)
Put cookies on a cooling rack and immediately gently press a Hershey kiss in the center of each cookie.
Cool & enjoy! Store cookies in closed containers for up to a week.