Help finding a BL manga

So I’ve been thinking about rereading this one BL manga but I don’t know where or what name it was!
The most precise thing I remember is the main character( or the lead is pretty sure) can eat/taste good without needing to eat the actual thing.
I remember one scene where he tasted this treat from a classmate, without needing to actually eat it! It was super cool and I really want to find it!!