First, preheat the oven to 350°F. Line two large baking sheets with parchment paper. Set aside. In a large bowl using a hand mixer (or in the bowl of a stand mixer), add the butter and sugar and beat for 1-2 minutes, until light and creamy.
With the mixer on low speed, beat in the egg and vanilla extract just until combined.
Add the flour and baking powder and stir in with a rubber spatula until just combined. Fold in chocolate chips until evenly distributed.
Using a two tablespoons cookie scoop, scoop out the cookie dough and arrange the dough balls 3 in apart on the prepared baking sheets. You will get 16-20 cookies.
Bake for 11 to 14 minutes, until the sides are lightly browned.
Remove the cookies from the oven and let them cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.