Preheat the oven to 350°F. Line baking sheets with parchment paper.
In a large mixing bowl, with an electric mixer on medium-high speed, cream together the butter and both sugars for 2-3 minutes or until light and fluffy. Add the egg and beat well to incorporate. Beat in the zest and vanilla extract.
In a medium bowl, whisk together flour, baking powder and salt. Add to the butter mixture and beat just until combined and dough comes together.
Using a stiff spatula, stir in the cranberries and chocolate chips just until incorporated. Shape into 1-inch balls (a small cookie scoop makes it easy) and place 2 inches apart on your prepared baking sheet.
Bake 12-15 minutes or until golden brown at the edges (Cookies with dried cranberries will bake faster, about 11-13 minutes).
Cool for 5 minutes on the baking sheet then transfer to wire rack to cool completely
Enjoy