I made the ‘ultimate’ mashed potatoes that were unbelievably creamy and velvety smooth

Mashed potatoes complete a lot of dishes. However, if not made right, can become lumpy and dry. In hopes of finding the best recipe for them, I found one that claimed to be the “ultimate” one, according to a Michelin-trained chef. Curious to see if this was true, I made them exclusively for Express.co.uk.
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