A woman’s special recipie for blueberry muffins is stolen from what is, in essence, a locked room, and Henry is able to determine how.

This is a surprisingly trivial story for the last Black Widower story published (in book form) before Asimov’s death. One can readily appreciate, of course, just how hard it would be for someone to take the theft of the recipe which is their greatest claim to fame, but it’s still relatively trivial. And the solution is reasonably plausible in its own way, and so I'm willing to give the story the benefit of the doubt although, in truth, I don’t really care for it terribly much.

Found In

	Puzzles of the Black Widowers