A universal door skin blank comprises an exterior side and an interior side for securing to a frame member, first and second molded, spaced stiles, and a flat planar portion disposed between the stiles and lying on a plane spaced from the plane of the stiles. An interface portion is disposed between and contiguous with the stiles and the flat planar portion. The invention also relates to a door having at least one universal door skin blank, with at least two separately formed rails secured to the planar portion of the blank at opposite ends thereof.