I'm doing a french project on chocolate lava cakes, but can't seem to find the origin?? Can anyone help me out here?! thanks!

Hi Laura,
We will be delighful to help you but we need some details : I do not now the word "lava" : could you please explain so that we can come back to you ?
regards

She is probably refering to "centre liquide" of chocolate. (when you put a ball of ganache in the center of a chocolate cake)