Berita Hari Ini: The science behind the perfect Oreo dunk


	March 19, 2026

Original photo by Dmitry Kuzmenko/ Unsplash

Scientists have studied the ideal amount of time to dunk an Oreo in milk.

Milk and cookies go together like peanut butter and jelly, salt and pepper, Barbie and Ken. That's especially true when it comes to Oreos. The brand's packaging proudly proclaims it's "milk's favorite cookie," and commercials over the years have featured parents teaching their children how to eat an Oreo: twist, lick, dunk. (That's another one of the cookie's slogans.) However, there is a right way and a wrong way to dunk an Oreo in milk, according to scientists.

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		Numbers Don't Lie

Percentage of creme filling in a "Double Stuf" Oreo compared to the original

186%

Number of mammalian species (Homo sapiens) that drink milk as adults

Year the "Oreo Biscuit" was introduced by Nabisco

1912

Gallons of milk an average dairy cow in the U.S. produces each day

7.5

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All humans used to be lactose intolerant.

All mammalian young produce an enzyme known as lactase, which allows babies to digest lactose, a naturally occurring sugar found in milk (human or otherwise). As mammals age, their bodies naturally produce less and less lactase, until eventually milk sugars are no longer digestible. But around 10,000 BCE, a genetic mutation in humans took hold near modern-day Turkey that effectively kept human lactase production permanently set in the "on" position. According to some anthropologists, this gave certain cultures a distinct advantage, since this new lactose tolerance added a pool of easily accessible calories to the human diet. A 2015 study looking at the DNA of Eurasians who lived between 6500 BCE and 300 BCE shows that Russian steppe herders likely introduced the mutation to Western Europe. However, humanity's ability to digest milk isn't as widespread as you might think. The U.S. Department of Health and Human Services estimates that 68% of the world's adult population experiences "lactose malabsorption," and those percentages are particularly high in Asia and Africa.