Classic crunchy choc chip cookie recipe with brownie mix

Ingredients

• 1/2 cup salted butter
• 1/2 cup shortening
• 1 cup brown sugar
• 1/2 cup white sugar
• 2 tea spoons vanila extract
• 3/4 tea spoon salt
• 1 table spoon white vinegar
• 2 large eggs
• 1 tea spoon baking soda
• 2 cups unbleached all-purpose flour
• 1 - 1/4 cup brownie mix, dry (staright from the box)
• 2 cups semisweet chocolate chips