Peterkin Custard was sold under the slogan Eggs is eggs, and so is Peterkin real egg custard, but it consisted mainly of maize starch, a bit of colouring and flavouring, and not more than four per cent dried egg, according to a certificate produced by the Public Analyst when a grocer selling the stuff was hauled before Marylebone Police Court in 1926.
The prosecution said that a pint of egg custard made in the traditional way would contain two whole eggs, whereas the amount of dried egg in Peterkin was just one-thirtieth of that amount.
For the defence, Mr W. Frampton submitted that Peterkin was not as bad as some custard powders which had no egg in at all (he didn't name names but Bird's is one) and with eggs costing tuppence ha'penny each, what did you expect from a packet of custard powder selling at a penny ha'penny?
The magistrate agreed. Case dismissed.