When little jack horner got his thumb stuck the the Christmas pie what came out?

Answer 1

A plum. The full nursery rhyme follows:

Little Jack Horner

Sat in the corner,

Eating a Christmas pie;

He put in his thumb,

And pulled out a plum,

And said 'What a good boy am I!'

Answer 2

A plum. The nursery rhyme "Little Jack Horner" tells the story of a boy who found a plum in a Christmas pie.