As far as I can tell, this recipe is not yet available on Nigella.com's recipe database; as it really is the original chocolate chip cookie recipe, I thought it was a necessary addition. Chocolate Chip Cookies were accidentally discovered at the Toll House Inn in the 1930s. The bakers were trying to make ordinary butter cookies into chocolate cookies by adding Nestle chocolate chunks (another relatively new 'invention' at the time), assuming that the chocolate would melt in the oven and thereby permeate the whole cookie. Instead, chocolate chip cookies were born. Nestle then bought the recipe from the Inn's owner and prints it on the back of every package of Nestle chocolate chips.
Recipe posted by Psappha