 At the height of the films popularity, Time Magazine printed the  Disney Special Effects Departments recipe for Flubber, as used in  the movie. It read as follows: "To one pound of salt water taffy add  one heaping tablespoon polyurethane foam, one cake crumbled yeast.  Mix till smooth, allow to rise. Then pour into saucepan over one cup  cracked rice with one cup water. Add topping of molasses. Boil till  lid lifts and says Qurlp." It is not recorded whether this also  carried the standard warning "do not try this at home".