How come some ice cream sandwiches don't melt in the blazing sun?

After hearing the news story about how a mother was concerned that her son's ice cream sandwich from Wal-Mart didn't melt after 12 hours in the sun, Dan Collins of KIKN 100.5 in Sioux Falls tested it out himself and recorded the process for video proof. Indeed, these things don't melt. But why? How is this possible?

Even after leaving the ice cream sandwich out in the sun for more than an hour in uncomfortable 80 degree summer weather, the ice cream sandwich was still intact. What is this sorcery?


The difference is in the ingredients, WCPO reports:

  • Walmart's ingredient list includes corn syrup, guar gum, and cellulose gum.
  • Unilever's Klondike Bars's ingredient list is very similar to Walmart's, with similar gums added.
  • Haagen Dazs contains just cream, milk, sugar, and eggs, and vanilla, but no corn syrup or gums of any type.

Science! Gross! Whatever. There's still something uncomfortable about the world if ice cream sandwiches don't melt and McDonald's food doesn't rot. Oh who am I kidding, I'll still eat them.

WCPO also tested Haagen Dazs—which melted in no time—and a Klondike Bar—which melted "to a fair extent." Now you make your choice at the ice cream fridge.


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