The quest to make an ice cream that doesn't melt

Ice cream is a classic summer treat, but it has one big problem: it melts very quickly in the heat. This can be frustrating, especially for children who end up with sticky hands and melting cones. Scientists and food companies have been working to solve this problem and create an ice cream that can withstand higher temperatures without turning into a puddle. The idea is to help people enjoy their ice cream longer, even on hot days, and to make it easier to transport and store ice cream without worrying about it melting.

A Japanese company called Kanazawa Ice has made headlines for developing ice cream and ice pops that do not melt as quickly as regular ones. Their secret is adding polyphenols, which are antioxidant molecules found in many fruits, to the ice cream. These polyphenols help the ice cream keep its shape and prevent it from melting into a liquid mess. People were amazed to see that the ice cream could survive heat and still look and taste good.

Normally, ice cream is made from cream and sugar, and it is churned in a machine that keeps it cold and smooth. If ice cream melts and then refreezes, it can develop large ice crystals, making it taste gritty and unpleasant. To prevent this, ice cream makers use stabilizers like carrageenan from seaweed and guar gum from seeds. These ingredients help the ice cream stay smooth and slow down melting, but they do not stop it completely.

Cameron Wicks, a food scientist, became interested in how polyphenols could make ice cream more stable. She experimented with adding tannic acid, a type of polyphenol, to cream. She found that higher amounts of tannic acid made the cream much thicker, almost like a gel. After chilling the mixture, it was so firm that it could be cut with a knife or turned upside down without falling out of the cup. When she looked at the mixture under a microscope, she saw that the tannic acid was creating a network that held the fat together, making it harder for the ice cream to melt.

However, there is a downside to using too much polyphenol. If the ice cream becomes too thick and rubbery, it loses the creamy texture that people love. The challenge for scientists is to find the right balance so that the ice cream melts more slowly but still tastes and feels like traditional ice cream. People have certain expectations when they eat ice cream, and if the texture is too different, they might not enjoy it as much.

In the future, polyphenols might be used along with other stabilizers to help ice cream survive long trips and hot weather. It is still unclear if this new type of ice cream will become popular and widely available. For now, scientists are continuing to experiment and look for ways to improve ice cream without changing what people love about it. Maybe one day, we will be able to enjoy ice cream on a hot day without worrying about it melting too fast.