Preheat oven to 350F. Line a cookie sheet with parchment paper and set aside.
Add butter and half the brownie mix to a large mixing bowl. Beat with a mixer until combined.
Add eggs and water and mix until incorporated.
Add the remaining brownie mix and vanilla instant pudding. Mix until all the ingredients are combined. The batter will be thick.
Fold in the chocolate chips with a spatula.
Using a medium cookie scoop, scoop the dough into a ball and place on the prepared cookie sheet. Keep cookies about 1 ½ inches apart as they will spread.
Bake for 11 to 12 minutes or until the edges are set.
Let cool on the pan for 2 to 3 minutes before transferring them to a cooling rack to cool completely.