You've lived among Muggles; can you tell me exactly what is the function of a rubber duck?
- Mr. Weasley, Harry Potter and the Chamber of Secrets
A collection of crystals, various powdered substances, some proteins.... And then it was transformed through a careful, deliberate process into a new shape, placed intentionally where it would be exposed to higher energies....
At the end of this process, Mikuru had transformed things into cookies, through some amazing, slow, medium-scale fusion that Kuyou was delighted to analyze the intricacies of. She could spend millions of rotations examining it and its nuances, at least!