This question already has an answer here:
We take for granted you can get almost anything you want.
But, Where do replicator patterns come from?
I don't recall any discussion of this. (Possibly the only evidence I can recall is that Data orders Feline Supplement #N.)
For example: Are they created by Starfleet Foodservices? Are there chefs who specialize in creating replicator patterns? Can you readily scan an object to create a replicator program? If you request the same item multiple times, how similar are they?
Related, but old; different scope; and has no well-sourced answer: If I want to replicate say three apples in a replicator, will they be exactly the same to the molecule or there would be slight variance?