Most cheap foods with chocolate already have little cocoa in it. The essence of chocolate is made up of three parts, a sweetener like sugar, an oil with a high melting point, and cocoa oil has one of the highest melting points out of plant oils, but is often mixed with cheaper oils like palm oil or coconut oil, which have a much higher melting point than most oils, but still not as high as that of cocoa oil. And the third part is the cocoa solids. As far as I know cocoa beans are both fermented and roasted. I think there are other plants suitable for making something similar to chocolate, turns out mango seed oil has a melting point similar to that of cocoa oil.