We Finally Know The Secret Behind McDonald's Fries That Makes Them So Irresistible

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We Finally Know The Secret Behind McDonald's Fries That Makes Them So Irresistible By Alexa Valme Sept. 1, 2025 11:39 am EST

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There's a reason McDonald's fries have built a cult following that few fast-food sides can touch. They aren't just popular — they're engineered to be irresistible. From the potato varieties chosen to the way each fry is processed before it ever hits a fryer, everything is designed to deliver that crunch-meets-fluff texture that keeps customers hooked. McDonald's leans on potato types like Russet Burbank and Shepody, prized for staying light in the middle while crisping perfectly on the outside. To make things even more consistent, the fries get a whisper of dextrose — a simple sugar — that helps them