There is a surprising amount of energy in food. It's also possible to make a thermic lance using materials such as spaghetti or bacon: https://hackaday.com/2011/02/11/thermic-lance-made-from-spag...
It seems like one of those things that shouldn't be surprising. We eat food for the calories, the same ones that feed the fire.
Re: Strawberry Pop-Tart Blow-Torches (1994)
#51There's a snack food in Finland called Hot Rods that ignite pretty easily with an ordinary match. It grosses people out but hey, that's calories !