The recipe given for the "knife" used in the "refrigerator" from the Food Plus mod is an iron bar in the middle, and a stick in the lower left according to the NEI but this makes a chisel. I assumed it wasn't shapeless and was, perhaps, misprinted and so I tried every combination I could, but to no avail. I'm assuming this is a bug.
EDIT: Posted in wrong place, working on moving it