Preheat oven to 350 degrees
Line 2 baking sheets with parchment
In a large bowl, combine butter, brown sugar, and sugar. Beat on medium until smooth.
Add egg and vanilla and beat on low until blended.
Slowly add the dry ingredients and beat on low until fully incorporated.
Mix in chocolate chips. The dough will look very chip-intensive. Don't worry, this is how it is supposed to look.
Drop dough by tablespoonfuls on the prepared baking sheets, spaced 2 inches apart.
Bake 10-13 minutes until the bottom and edges are lightly browned and the tops feel firm when lightly touched.
Cool on sheets for 5 minutes and transfer to wire racks to cool completely.