[Oyk]

Butter is for the bread, not coffee lah.  

.

In the old days when those Hylam kor roasted the coffee beans at the back lanes of shop house coffee shops, they added butter.

They didn't throw a slab of butter in the coffee.

Sgbuffet wouldn't have seen how they did it as that was the PG... his grandfather's generation plus he was born and grew up in Muar.