cheapcake
noun
Plural: cheapcakes
A piece meal made of inexpensive ingredients, especially if it is not possible to sell it for a commercially lucrative price.
Examples:
You are probably not frequently offered Barton-tradition pancakes: Not many pubs or restaurants are willing to fiddle with a sole cheapcake for an hour-ish or longer. (Source: J∙ Okram - Bartonian Potato Pancakes ● Cooking Recipe.)