Why Mustard Oil Sometimes Looks Cloudy

Cloudiness in mustard oil worries a lot of first time buyers, but it is usually a sign of how the oil was pressed and stored, not that something has gone wrong with it.

What is actually happening

Unrefined mustard oil is not filtered as thoroughly as refined oil, so a natural sediment can settle and cause cloudiness over time.
Cold temperatures can cause some natural compounds in unrefined oil to solidify slightly, clouding it until it warms back to room temperature.
Cloudiness alone is not a reliable sign of spoilage. Smell and taste are better indicators of whether an oil has actually gone off.
Shaking the bottle before use redistributes settled sediment rather than indicating anything is genuinely wrong with the oil.

One thread asks whether sediment in cold-pressed oil bottles goes rancid faster than the clear oil above it, worth reading if this has been on your mind.

Picked this week

Cold-pressed and naturally cloudy

Sajerah Farm I · Sajerah

Black Mustard Oil

$2.39 · 1 KG

Our standards

Cloudy mustard oil questions

Should I pour off cloudy sediment or shake it back in?: Either is fine. Shaking redistributes it through the oil, pouring it off simply leaves a clearer oil above the sediment layer.
Does cold weather always cause mustard oil to cloud?: It can, especially with unrefined oil, and it should clear again once the oil returns to room temperature.
How do I tell cloudiness from actual spoilage?: Smell and taste are the real test. A flat or sour smell means spoilage. Cloudiness alone usually does not.
Is refined mustard oil ever cloudy?: Rarely, since refining removes most of the natural sediment and compounds that cause cloudiness in unrefined oil.

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