Is there a German equivalent to the phrase “teach your grandmother to suck eggs”?

[Thudlow_Boink]

@TwoCarrotSnowman

What would be the German-language equivalent

No clue, but in this old thread someone offered a supposed French equivalent:

Why is Grandma so good at sucking eggs?

The French equivalent, as far as I am aware, is ‘The goslings want to lead the geese to pasture’. My copy of ‘Brewers Dictionary Of Phrase & Fable’ fails to give the origin, but my money is on *Eric Cantona. . . . *Former Manchester United soccer legend, now a big cheese in beach football.