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Ask Dr. Gourmet

How do I make rock candy syrup?

Please, we need some help. How do you make rock candy syrup? I've run out and can not find it anywhere. We use it in a special wine punch.

Dr. Gourmet Says...

cubes of white sugar

Rock candy syrup is made by adding sugar to simmering water. Keep adding the sugar as the water boils slowly until no more sugar will dissolve. This is known as a super-saturated syrup. Because the sugar concentration is so high in the syrup, it will crystallize easily. Hang a string or stick in the syrup and the crystals will grow.

Keep in mind that rock candy is very high in calories. Because it is essentially the same as eating raw sugar, a piece the size of a tablespoon will have almost 50 calories. These aren't the healthiest calories since they are such a concentration of sugar.

Thanks for writing,

Timothy S. Harlan, MD, FACP
Dr. Gourmet