Homemade to me is anything I make mostly by myself. I agree that Brownies from a mix still counts as homemade because you have to add ingredients, mix and cook yourself.
If you are talking about quilting items, if they are already made and I am adding a decoration or applique, then I can't consider the finished product as homemade. If I buy quilted material that I have to sew and make into something, then that is homemade.
Why the question? What was your point in asking this question?