Preheat your oven to 375°F. Line a baking sheet with parchment paper or a silicone baking mat.
In a large mixing bowl, combine the brownie mix and flour. Stir in the oil, water, and eggs until fully incorporated.
Fold in the chocolate chips until evenly distributed throughout the dough.
Scoop the dough into 1.5 tablespoon-sized portions and place them a few inches apart on the prepared baking sheet.
Bake for 8–10 minutes or until the tops are crinkly and the edges look set. The centers should still look slightly soft.
Let the cookies rest on the baking sheet for 5 minutes before transferring them to a cooling rack.