Do I drink (喝) or eat (吃) a soup in Chinese? In English you say eat soup, not drink soup. But how about Mandarin?

Drink


  這個菜湯很香！　你喝喝看！　（This vegetable soup is really tasty! You try it!)


or eat？


  這個菜湯很香！　你吃吃看！　（This vegetable soup is really tasty! You try it!)


Or are both valid?
The idiomatic way to say 'try it' in Chinese is 尝一下，尝尝，尝一尝. 

You can also say 你吃一口(试试/尝尝) and 你喝一口(试试/尝尝) for eating and drinking respectively. 

Your version 你喝喝看 is good too. But 你吃吃看 is not suitable for drinkings and soups. This is different from English.