Q: What Sutra contains the text explaining the Five Flavors?
A: The Mahāparinirvāṇa Sūtra.

Q: What does the text say?

A: This Sutra says, “It is analogous to a cow giving milk. Cream emerges from the milk. Curds emerge from the cream. Butter emerges from the curds. Ghee emerges from the butter. The twelvefold scripture emerges from the Buddha. …” The Sutras emerge from the twelvefold scripture. The Vaipulya texts emerge from these Sutras. The Prajn͂ā-pāramitā Sūtras emerge from the Vaipulya texts. The Mahāparinirvāṇa Sūtra emerges from the Prajn͂ā-pāramitā Sūtras.