A dish prepared from memory changes a little with the person doing the remembering.

A dish cooked from memory drifts with whoever is remembering. Each cook adjusts to their own taste without noticing, and over a few decades of that, the thing has genuinely changed while everyone maintains they are making the original. Memory is not a storage medium; it is a process that revises as it repeats.

This is worth knowing about all inherited things, not just food. The story your family tells, the way an argument gets recounted, the version of an event everyone agrees on: each retelling adjusts it slightly. Not through dishonesty. If accuracy matters for something, write it down close to the time, because the memory will not hold still.