Menachos 6:3-4

Menachos 6:3

All flour offerings that are prepared in a vessel require three applications of oil before they’re ready: pouring oil on them, mixing them with oil and putting oil in the vessel. (These are actually listed in reverse chronological order.) Rebbi says that cakes are mixed with oil; the Sages say that the fine flour is mixed with oil (i.e., while the cakes are still flour). Cakes require mixing with oil but wafers require anointing, which was done in the shape of an X. The rest of the oil was consumed by the kohanim.

Menachos 6:4

All flour offerings that are prepared in a vessel require breaking into pieces. The flour offering of a Yisroel is folded in half, then in half again, and then broken on the folds. The flour offering of a kohein is folded in half, then in half again, but it is not broken. The flour offering of the Kohein Gadol wasn’t folded twice (but it was folded once). Rabbi Shimon explains that the flour offerings of kohanim and of the Kohein Gadol are not broken into pieces because the handful isn’t taken from them, and whatever doesn’t have the handful taken likewise isn’t broken into pieces. All of the broken pieces are the size of an olive (or, possibly, not to be smaller than an olive).