What is soul made of; as per Buddhism?
In Buddhism a human being is composed of matter, feelings, perceptions &amp; memories, mental fabrications (thinking) and consciousness.

A soul is a conceptual belief which does not exist. It is concept which is deeply ingrained in the mind. 

Just like a car is just a concept which is an accumulation of parts a steering wheel, chassis, wing mrrors etc..

For more on consciousness in the Theravada tradition and how kamma transmigrate see my other post