A system and method for modifying the output of a computer program without source code modification. A computer program reads in two files, an input data file and a recipe text file. The data input file contains name/value pairs to be rendered to an output device and the recipe text file contains the formatting descriptions. The name/value pairs of the data input file need not be arranged according to a required structure. During the execution of the program, the formatting descriptions of the recipe text file are converted into a sequence of executable objects and the name/value pairs from the data input file are rendered in a format according to these formatting descriptions. A coordinated alteration of the input text file and the recipe text file will result in a modification to the output format.