How do you say delicous in Chinese?

很好吃！很香！

（hen3 hao3 chi1！hen3 xiang1！）

Where the numbers behind the pronunciation indicate tone.

The first loosely translates to "It's very yummy! Or it tastes great!" the second part means that "It's very good smelling"。

The actual translation of delicious is 美味 (mei3 wei4) but we don't use it very often in informal speech.