Using a stand mixer with the paddle attachment, cream butter, brown sugar and white sugar until light and fluffy.
1 & 1/4 cups unsalted butter, 1 cup dark brown sugar, 1 cup granulated sugar
Add eggs, one at a time, mixing well after each addition, then add vanilla.
2 large eggs, 2 tsp vanilla
Add dry ingredients until just combined.
Stir in chocolate chips.
2 cups semi sweet chocolate chips
Line a large cookie sheet with wax or parchment paper, then drop rounded cookie dough using a medium cookie scoop or a heaping tablespoon. Add a few extra chocolate chips on top if desired. (You can just refrigerate the dough as is and form the rounded dough when ready to bake, but forming the dough before chilling will save you a lot of muscle work.)
Cover with plastic wrap and refrigerate for 24-36hrs.
When ready to bake, preheat oven to 350°F. Line baking sheet with parchment paper. Place 12 rounded cookie doughs 2 inches apart.
Bake for 10 minutes or just until edges are golden brown.
Let the cookies continue to bake on cookie sheet for 5 minutes before transferring to cooling rack and enjoy!
Notes
Store cookies in an airtight container for up to 5 days.