Ben Mosley, 31, was walking in his fields in Chelmorton with his son Harry, three, when they found the large mushroom.
The horse mushroom, which is edible, weighed one and a half pounds and was 10.4 inches by 8.
Ben said: “I couldn’t believe it when I saw it - I have never seen a mushroom that big!”
He took the mushroom home where it went on toast for him, his wife and son.
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