It depends on the location of your study. In U.S., I would recommend you to check American Housing Survey (AHS) that includes energy consumption information of more than 10,000 sample points of residential house data. The AHS data is open access. you can easily calculate the average amount of energy consumed for residential cooking using excel.
I have some infomation about this subjet for Argentina. The preprint is in Spanish but the graph are self explanatory. If you need anything about this material, please write me.