Why jaggery powder hardens, and how to keep it free-flowing
Kitchen notes · 26 August 2026
If your jaggery powder has set into a block, nothing has gone wrong with it. Jaggery is hygroscopic, which means it pulls moisture out of the air around it. In an Indian kitchen, between steam from the stove and humidity in the monsoon, there is plenty of moisture to pull.
What is actually happening
Each grain of jaggery has a fine, slightly sticky surface. When it takes on moisture, neighbouring grains bond to each other and the powder knits into a solid mass. It is the same reason a bag of brown sugar goes hard. The taste, the colour and the quality are unchanged.
Three habits that prevent it
Close the lid properly, every single time. Our jars are airtight for exactly this reason, but only if the lid is screwed down rather than rested on top.
Always use a dry spoon. A spoon still wet from tea will introduce enough water to start a clump around it, and that clump grows.
Keep the jar away from the stove and the window. A cool, dry shelf inside a cupboard is better than a counter beside the hob or in direct sunlight.
If it has already set
Break it up with the back of a dry spoon, or a fork. It loosens easily and behaves exactly as it did before. If a jar has gone particularly solid, leave it open in a dry room for an hour before breaking it. Do not put it in the fridge, which is a humid place and will make matters worse.