Comment by gwd

Speaking as an American, this is a part of American culture that's so weird -- using a pre-made mix as a base for a recipe that it's not designed for. That recipe looks like it just has flour, cocoa powder, baking powder, and salt pre-mixed (with a load of other garbage you probably don't need). People don't seem to realize that you can just buy those ingredients yourself. It doesn't take that much extra time to measure them out, and it's way cheaper.