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.)