Americans replaced alcohol with sweets, generally. There's a reason a huge fraction of the modern candies and confections either got their start or took on their modern forms during this era. Prohibition is probably single handedly responsible for more of the "processed sweet junk" in the American diet than any other singular policy. It really is the gift that keeps on giving.

That said, ice cream is aa highly underrated dessert and I have a hard time thinking of a better item to have available on un-air conditioned ships in a tropical environment, absolutely on par with a cold beer.