Preheat oven to 350° Fahrenheit and line two baking sheets with parchment paper. Set aside. To a large bowl, add the brownie mix, flour, coconut oil, eggs, and vanilla extract. Whisk until combined. Fold in the pecans and chocolate chips, if using. Scoop the dough onto the prepared baking sheet, at least 2 inches apart. Place cookies in the oven and bake for 10-12 minutes until the cookies are mostly set. Remove cookies from oven and cool in the baking sheet for about 5 minutes. Transfer to a cooling rack to cool completely. Makes 18-22 cookies