YOU SAID:

My younger brother’s coffee roasted the roof of my mouth.

INTO JAPANESE

弟のコーヒーが口の屋根を焼きました。

BACK INTO ENGLISH

My brother's coffee baked the roof of his mouth.

INTO JAPANESE

兄のコーヒーが口の屋根を焼き上げた。

BACK INTO ENGLISH

My brother's coffee baked the roof of his mouth.