It’s reported that the 1666 fire that swept London was actually started by King Charles II’s baker, Thomas Farrinor, who accidentally went to bed with his oven still burning.
The phrase “from pudding to pie” comes directly from the Great Fire of London.
Farrinor’s house was situated on Pudding Lane. Pie Lane is located on the other side of the city where the fire finally stopped.
So those clever and punny Brits used “from pudding to pie” to mean the whole bloomin’ city from then on.