http://i.imgur.com/rPoNeFU.gifv

The full version:
https://www.youtube.com/watch?v=oSd0keSj2W8

In the 1970s my mother worked in food production for TV commercials.  A few of them alongside a director called Ridley Scott (whose career went rapidly downhill after that bigtime exposure https://www.businessinsider.com/tv-ads-ridley-scott-made-before-he-directed-prometheus-and-alien-2012-6?IR=T).

Back then the tricks of the trade were slightly different...

pies baked full with cotton wool to make them puff out

cigarette smoke blown on food for that delicious hot fresh out of the oven look