Oilseed Cake (Press Cake)
Cake vs meal
The names reflect the extraction method. Press cake is the firm solid that exits a press, still holding a meaningful residual oil of 6–18%. Meal is the equivalent from solvent extraction, with oil stripped to about 1% — a cleaner, higher-protein, defatted product. For some crops the meal is the main prize: defatted soybean meal is a benchmark protein feed that often drives the crush economics more than the oil.
Value and uses
Oilseed cake and meal are valued mainly as protein-rich animal feed, and their protein content rises as oil (and, where dehulled, hull) is removed. Some cakes serve other uses — as organic fertilizer, biomass fuel, or feedstock for further processing — and a few carry cautions (for example, cottonseed meal's gossypol or castor cake's toxins require handling). Planning the cake or meal alongside the oil, rather than treating it as a leftover, is central to oil-processing economics: it is a second revenue stream that can equal or exceed the oil's value.
Quick facts
| Attribute | Value |
|---|---|
| Press cake | Solid left after pressing |
| Meal | Equivalent from solvent extraction |
| Press cake oil | Higher (6–18% residual) |
| Solvent meal oil | Low (~1%) |
| Main use | Protein animal feed |
Related pages
Related terms
Residual oil · Oil expeller · Miscella
Press cake versus solvent meal
The solid left after oil is removed goes by two related names, and the difference matters. Press cake is what a mechanical press leaves — it still holds a meaningful amount of oil (roughly 5–8% after a good double press, 10–18% after a single pass). Solvent meal is what a solvent extraction plant leaves after desolventizing — a low-fat, defatted material at around 1% oil. So press cake is oilier and often used locally, while defatted meal is the clean, high-protein product traded as animal feed.
Why the cake is a valuable co-product
For many oilseeds the cake or meal is not waste but a second product, and for some it drives the economics more than the oil. Oilseed cake is protein-rich and widely used as animal feed; soybean is the classic case, where the high-protein meal is often the main reason the crop is crushed at all. Some cakes need treatment before use — cottonseed carries gossypol, castor cake carries ricin — so "feed grade" depends on the seed. Comparing processing routes therefore means comparing both the oil and the cake they produce.
Related reading: Press cake vs solvent meal compared in detail.
FAQ
What is oilseed cake?
The solid residue left after oil is pressed from oilseed. It still contains some residual oil and is valued mainly as protein-rich animal feed. The solvent-extraction equivalent is called meal.
What is the difference between cake and meal?
Cake comes from pressing and retains more oil (6–18%); meal comes from solvent extraction and has oil stripped to about 1%, giving a higher-protein defatted product.
What is oilseed cake used for?
Mainly as protein animal feed; also as fertilizer, biomass fuel or further-processing feedstock. Some cakes require caution (e.g., gossypol in cottonseed, toxins in castor).
Does the cake affect oil-mill profits?
Significantly — cake or meal is a second revenue stream that, for crops like soybean, can drive the economics more than the oil itself.