"That looks delicious!” (3-3)
I believe the answer is:
yum-yum
(Other definitions for yum-yum that I've seen before include "Mmmmmm!" , "One of the Three Little Maids from School - that's tasty!" , "Expression of delight, especially of delicious food" , "That's delicious!" , "Exclamation of pleasure at eating, from heroine of The Mikado" .)