Joe subsided with as scornful a curl to his nose as its chilly state permitted, and Merry Grant introduced a subject of general interest by asking abruptly, -
"Who is going to the candy-scrape to-night?"
Majlo - again, never heard of it, but from the context, I suspect it is the (outmoded) custom of inviting friends to one's house and feeding them with home-made candy. The story refers to a 'barrel of molasses' - presumably the candy will be made from this.
A gathering involving lots of sweet things to eat?
If, as was suggested in an earlier thread, this story is by Louisa May Alcott, then it is using somewhat outdated American English. Majlo, who is the author and what is the first date of publication of this story?