I don't know where it came from but scratch's "true meaning" in the context that I used the word:
1: from a point at which nothing has been done ahead of time (for instance cooking on the trail with generic pasta, oatmeal, rice etc. and adding salt, pepper, and spices for flavor)
2: without using a prepared mixture of ingredients. At home this means baking such things as cake, bread or biscuits from flour, eggs, sugar, baking powder, yeast and other basic ingredients, rather from ingredients packaged together at a factory somewhere.
I used to buy sausage. Then it dawned on me that sausage is just ground pork with salt, pepper and a few spices, mostly sage, added for flavor.
Mixing the ingredients yourself has two benefits. One you know precisely what the sausage contains. Two the price is slashed by about two thirds, compared to commerical sausage. (I mostly give the savings to the Maine AT Land trust to help buffer the Maine trail.)
Weary
www.matlt.org