How does kitniyot work?
A fascinating question with clear Pesach relevance for Ashkenazim
By: Jisrael Yitzchak Rosenfeld
Chaverim, here is a very interesting question with a clear connection to Pesach for Ashkenazim:
How does kitniyot work?
When this custom originally developed, products such as quinoa and chia seeds did not yet exist. Yet today they are often treated as kitniyot. On the other hand, coffee beans—which already existed at the time and could also have been stored near flour—are not considered kitniyot.
What lies behind this distinction?
This is an excellent and profound question, because it forces us to think not only about what halacha says, but about how the system itself functions.
Kitniyot can often seem inconsistent—some items are included while others are not—but once the underlying concerns are understood, the picture becomes much clearer.
Let us therefore analyze this thoroughly.
Conclusion
The minhag (custom) of kitniyot is not based on a single rule, but on a combination of concerns, including:
- Mixture
- Confusion
- Usage
Therefore:
- Not all “kitniyot-type” products are the same.
- Some modern products (such as quinoa) are permitted by many poskim.
- Clearly distinct items (such as coffee) are generally excluded.
- Each case depends on how closely it aligns with the original concerns behind kitniyot.
1. Kitniyot is a system – not a single reason
Kitniyot was not prohibited for one single reason.
Rather, it is based on multiple overlapping concerns:
- Possible mixture with grain (chametz)
- Cultivation in the same fields as grain
- Storage together with grain
- Similarity to grain products
- Processing into flour-like substances
Thus, kitniyot is not a simple rule, but a network of concerns.
2. Concern #1: Mixture (cultivation & storage)
A major issue is that these products were often:
- Grown in the same fields as wheat
- Stored in the same sacks
This creates a risk that actual wheat may become mixed in and cooked together, leading to chametz.
3. Concern #2: Visual and practical confusion
Another issue is the risk of confusion:
- Some of these products can be ground into flour
- They may resemble wheat flour
This can lead to two types of errors:
- One might mistakenly think wheat flour is permitted
- Others might wrongly suspect someone of violating Pesach laws
4. Concern #3: Culinary usage
These products are often used in ways similar to grain:
- Thickening soups
- Baking or cooking with a flour-like texture
Someone observing this might assume that regular flour is also permitted.
5. Not all kitniyot are equal
Since the custom is based on multiple factors, not every case is identical.
Therefore, there are differing opinions among poskim (halachic authorities) regarding modern products:
- Quinoa
– Permitted by many, as it is a distinct product not included in the original custom - Certain oils
– Sometimes treated more leniently, since they are extracted and not used as flour
6. Why coffee is different
Coffee beans are generally permitted because:
- They are clearly recognizable (dark and visually distinct)
- They are not used as flour
- There is minimal risk of confusion with chametz
Even when stored near grain, the likelihood of confusion or misuse is very small.
7. The underlying principle
Kitniyot is not only about the product itself, but about the risk of confusion and mixture.
The more a product:
- Resembles grain
- Is used like grain
- Can be confused with grain
—the more likely it is to fall under the minhag of kitniyot.
Sources & Footnotes
- Rema, Orach Chaim 453:1 – the custom of kitniyot
- Mishnah Berurah 453 – reasons for the custom
- Contemporary halachic discussions on quinoa and derivative products in modern kashrut literature
