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    Not only was adding fruit to the bottom a sweet answer to his American palate problem, but placing the fruit below the yogurt achieved another, perhaps less obvious goal. At the time, U.S. Food Safety standards for dairy production required that dairy products not be mixed with other things in it. Putting fruit on the top—or blending it—would have broken this requirement. By placing the fruit on the bottom and the cultured milk on top, Carasso was able to convince health authorities that it would be safe to package and eat due to “the low Ph, based on the acidity in fermentation that happens,” according to Michael Neuwirth, a spokesman for Dannon