What is the grain offering (minchah) in the Bible?

The grain offering is the one sacrifice in Leviticus with no animal and no blood — fine flour, oil, and frankincense brought as a tribute-gift to God, of which a handful is burned and the rest becomes food for the priests.

The grain offering is the bloodless sacrifice of Leviticus 2 — fine flour, oil, and (in two of its three grades) frankincense, presented to God with no animal and no knife involved at all.

Its Hebrew name is minchah (מִנְחָה, H4503), and before Leviticus ever made it a recipe, the word simply meant "gift" or "tribute" — the present a subordinate brings to a superior to win or express favor. That everyday sense is visible all over the canon outside the sacrificial law. When Jacob sends droves of goats, sheep, camels, and cattle ahead to appease his brother Esau, he calls the whole herd a minchah (Genesis 32:18) — proof the word's root sense is the act of tribute, not the material offered. When contemptuous men refuse to honor the newly anointed King Saul, the text says pointedly that "they brought him no gift" (1 Samuel 10:27). And when the Babylonian king Merodach-Baladan sends the ailing Hezekiah letters, he sends a minchah too (2 Kings 20:12) — ordinary royal tribute, nothing cultic about it.

Leviticus 2 takes that word and fixes it as a liturgical category: fine flour (solet, H5560) mixed with oil (shemen, H8081), with frankincense (levonah, H3828) placed on the uncooked grade and the firstfruits grade, but not on the baked grades in between. The chapter lays out three ways it can be prepared — uncooked, baked (as cakes, wafers, griddle-bread, or pan-bread), and roasted firstfruits — introduced one after another with the same recurring phrase, "and if" (Leviticus 2:4, 5, 7, 14).

Whatever the grade, the disposal is the same, and this is what sets the grain offering apart from the burnt offering next door. The priest takes only a handful and burns it on the altar as a memorial; everything else belongs to the priests to eat, called "a most holy thing, from the LORD's fire offerings" (Leviticus 2:3, 10). The burnt offering held nothing back for anyone. The grain offering is the offering the priests actually live on.

When anyone brings a grain offering to the LORD, his offering shall be of fine flour. He shall pour oil on it and put frankincense on it and bring it to Aaron's sons the priests. — Leviticus 2:1-2 (MT)

And grain was never a lesser cousin to blood on the altar. The two travel together constantly — the daily burnt offering, morning and evening, is always paired with its own minchah of flour and oil (Numbers 28:5-6). The contrast between Leviticus 1 and 2 is a contrast of kind, not of rank: a bloodless gift standing right beside the blood, both called "a pleasing aroma to the LORD."

Underneath it all is the first minchah of the whole Bible — the offerings of Cain and Abel, where the very same word describes both a grain gift and an animal gift (Genesis 4:3-5), long before Leviticus turned it into fixed law. The full study on the grain offering traces that word all the way from Jacob's tribute-herds to Malachi's vision of a pure offering among the nations.