Sagot :
There might have been undissolved grains of sugar on the sides of the pan that washed into the jelly while ladling into the jars. Overcooking the jam or jelly by cooking too long. Doubling or tripling the batch.
There might have been undissolved grains of sugar on the sides of the pan that washed into the jelly while ladling into the jars. Overcooking the jam or jelly by cooking too long. Doubling or tripling the batch.