A disposable bag used to make a lower and upper crusts for a circular pie. The bag is square or rectangular, and is sufficient in width and length to hold a pre-cooked, 11 inch circular or rectangular pie. The bag is made of disposable, FDA food approved plastic film with a top layer and a bottom layer that are registered and partially sealed along its perimeter edges. A section of the edges of the bag are detached thereby forming a large opening into the bag allows a pie pan to be easily inserted into the bag. Formed on the top layer is a centrally perforated line can be easily torn to allow the bags top layer to be unfold so that the flat dough configuration used to make the upper crust may be easily removed and aligned over a pie. Imprinted on the outside surface of the top layer are one or two, centrally aligned pie pan crust templates that the user uses to make flat dough configurations with the proper diameters for the upper and lower crusts on a pie, respectively. Using the above bag, a method for manufacturing a pie is also disclosed.