noun
dark chocolate; bitter chocolate
Refers to chocolate with high cocoa content and little sugar, often used in baking or as a less sweet eating chocolate.
from English bitter chocolate
このケーキにはビターチョコレートを使っています。
This cake uses dark chocolate.
甘いのが苦手なので、ビターチョコレートの
I don't like sweet things, so I prefer dark chocolate.