Preheat your oven to 375 degrees F. Line a baking sheet with a Silpat. I love using this to make sure the cookies don't stick. If you don't have a Silpat you could also use parchment paper.
In a medium sized bowl mix together the dry ingredients - flour, baking soda, baking powder, and salt.
In a large bowl cream together the softened butter, granulated sugar and brown sugar.
Add the egg and vanilla extract to the butter mixutre and blend until mixed.
Add the dry ingredients (a little at a time) and mix with a spoon.
Add the chocolate chips.
Use a cookie scoop to scoop the dough on the silpat lined baking sheet. Bake them for 7-9 minutes or until the edges are slightly brown. Don't overbake them!
Let them sit on the pan for a couple of minutes before transferring them to a drying rack.