There's a flaw in your premise. Combining cacao powder and cacao butter is not making chocolate from scratch, it is combining two already processed products. Anyone wanting to avoid big chocolate companies would not enthusiastically use Hershey's. They're big, wouldn't you say? (and did they ever come out against child slavery?) To me, making chocolate from scratch means starting with the whole cacao beans or at least nibs. Which may or may not be worth it but is a good learning exercise on how chocolate is actually made.
It's great that you've found a way to produce confections in a place with so many limitations but you're not exactly doing bean-to-bonbon. They don’t teach that method in schools because it’s not a traditional method. In order to get cocoa powder, you first have to roast, crack, winnow, and grind the beans then press the cacao butter out and grind the hard cake left behind into powder. Your method is simply. putting those parts back together.
Can you get beans or nibs from your friend in Africa? Are you already using a grinder to combine things and pulverize the sugar? Then you can really try making chocolate from scratch!
