is not known. It is likely that it started around 1960 as that is the time outside propane deep fryers became available. Most attribute the origin to Louisiana. For those that haven't tried it. One word of caution, when immersing the turkey in the hot oil do it VERY slowly and wear a protective glove. Immersing to quickly will result in the oil boiling over and down onto the burner which will result in a serious fire. Keep your burner off the deck and away from the house. If done right (injected) the results will be well worth the effort. I recommend that you have someone that has done it before to guide you. The process is not to be taken lightly. Injestors and spices can be ordered on line from various Louisiana companies.