Classic crunchy choc. chip cookie w/brownie mix.

Preparation

• Preheat oven to 350 degrees F.
• In a large mixing bowl, cream together the butter, shortening, sugars, vanilla, salt, and vinegar.
• Beat in the eggs, then the baking soda and flour. Stir in the brownie mix and chips.
• Drop the dough by a small tablespoonful onto baking sheets. Bake for 10-12 minutes.
• Remove from the oven and transfer to a rack to cool.