The Cadbury Brothers introduced their fondant-filled chocolate egg in 1923, which now sells some 200 million per year. They assure us that it has not got smaller over the years - it is just that we've got bigger.

Imitation fondant eggs are not entirely new. See the 15th Century Creme Eggs for Lent


Cadbury Creme Egg, whole and split
Image: Evan-Amos