How to Delete an Email from Gmail "Sent Mail" But Keep a Copy in "All Mail"

Have you got the butter? Now if you also still had the money used to buy the butter, that would be proverbially swell, would it not?
To lend the French expression avoir le beurre et l'argent du beurre (to have the butter and the butter monies), which, astonishingly, seems to be not even 100 years old, additional grease, "beurre" is also an old-fashioned slang expression for money.
In any event, Gmail lets you delete your sent email and have it, too:
›› Want to keep your inbox clean and your outbox, too? Here's how to remove an email you sent from Gmail's "Sent Mail" while keeping a copy in "All Mail". (Archiving and deleting won't do the trick.)