Recipe: Super-Heated Knife! is a holotape in the Fallout: New Vegas add-on, Dead Money. It can be found on a terminal in the suites area of the Sierra Madre.
Transcript
Played around with this the
other day, and:
1 Cosmic "Piece-of-Shit" Knife
1 Pilot light
1 Hot Plate
Something to hold the damn
thing to cook evenly
Pre-Heat oven to 450
degrees
Take 1 knife, leave on
stove!
Let simmer for 5 minutes
Watch as Knife glows red-hot
Put Knife on table, melts
table
Sue scientist who made damn
thing
Give it to the military?