Answer:
It is the great nemesis of the lactose intolerant.
What is up that’s also down? What’s a smile and a frown?
What is weightless but it needs two person to hold it?
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
It is sometimes known to have silver linings.
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?