“Pretty please with sugar on top”

Question

Where does this expression come from?

I understand when it's used, but I was wondering about its origin.

Answer 1

According to The Word Detective:

The earliest citation in the Oxford English Dictionary for “pretty please” is from 1913, and the earliest for “pretty please with sugar on top” is from 1973. But my guess is that “with sugar on top” actually arose much earlier, at least by the 1950s. While sprinkling sugar on food has a long history, it was in the 1950s when ready-made sugar-coated breakfast cereal became popular, and the phrase may have been spawned then in imitation of advertising (“Ask Mom for Choco-Balls — the ones with with sugar on top!”) for such wholesome fare.

If you're a word lover, the whole article is well worth reading.

Answer 2

I found a use of the phrase in The Sun of New London, Connecticut, January 13, 1917: