noun
double boiler; jacketed kettle
A cooking pot with two layers, where the outer jacket holds water or steam to heat the inner pot gently. Used for melting chocolate, making custards, or in commercial kitchens.
チョコレートを溶かすときは二重釜を使うと焦げにくい。
When melting chocolate, using a double boiler makes it less likely to burn.
業務用の二重釜で大量のスープを作る。
They make large batches of soup in a commercial jacketed kettle.