I want to design Turkish coffee, but I keep finding that the taste is widely affected by the person who brewes the coffee and the temperature at which he does it. I want to make my coffee immune to brewing temperature and techniques as much as possible, what should I do?
Whatever you do, Turkish brewing mostly reflects the proper technique.
Still, if you really consider temperature stability as your first concern; there is something you can do. Try to keep the temperature of the cezve intact.
To do so, you need lots of metal to evenly share and distribute the thermal capacity. But... Turkish coffee brewing must be done so quickly. Somewhere around 80 seconds at all. Then, you also need thermal connectivity; which boils down to thick copper.
Again, copper may be poisonous; so, it is plated. Better option is silver for better thermal connectivity. Second, cheaper option is tin. As you see, even a single cezve may cost a lot.
If you think your technique is advanced, stainless steel may do based on your budget.
Please see this previous answer: