YOU SAID:

the cake is yummy and so is the icing

INTO JAPANESE

ケーキも美味しいし、アイシングも美味しい

BACK INTO ENGLISH

The cake is delicious and the icing is also delicious.

INTO JAPANESE

ケーキも美味しいですが、アイシングも美味しいです。

BACK INTO ENGLISH

The cake is delicious, but so is the icing.

INTO JAPANESE

ケーキも美味しいですが、アイシングも美味しいです。

BACK INTO ENGLISH

The cake is delicious, but so is the icing.