Chocolate chip cookies require approximately 15 minutes to prepare the dough and nine minutes per batch to cook. For five dozen cookies, the entire process from start to finish requires approximately an hour.
The use of two or more baking sheets speeds the baking process by allowing the cook to cool a batch of fresh baked cookies and prepare the next set while a batch is in the oven. Preparing the cookies as bars rather than individual round cookies reduces cooking time by approximately five minutes. Refrigeration of the dough to make slice-and-bake cookies lengthens the necessary time by at least 1 1/2 hours.