Komentarz do Terumot 10:4

אלא ריח כמון – that exactly the smell of (spices) [cumin] enters into the pita/bread, and the scent/smell is not a matter, whether with heave-offering/Terumah or with all of the prohibitions tht are in the Torah. And if it is because the oven was heated with heae-offering, its prohibition is ot a prohibition of deriving benefit.

Introduction Our mishnah teaches that hullin that absorbs the smell of something that was terumah is still permitted to non-priests.

If an oven was heated with cumin of terumah and bread was baked in it, the bread is permitted, for there is no taste of cumin, just the smell of cumin. If someone uses sticks of terumah cumin as kindling for his oven the bread cooked in the oven does not take on the status of terumah because the cumin gives off a smell but not a taste. The fact that the bread smells like terumah does not make it prohibited to non-priests because non-priests can smell terumah, they just can’t eat it.