"[In the] land of milk and honey" is an established phrase which can be found in many dictionaries.
From Merriam Webster:
land of milk and honey
noun phrase
: a place where there is plenty of food and money and life is very easy
// Many immigrants thought that America was a land of milk and honey.
From The Free Dictionary:
land of milk and honey
A place of abundance that is free from want. The phrase comes from the Biblical description of the land promised to the Israelites.
It might be better than where you came from, but don't think this is some utopia or land of milk and honey—we still have to work for what we have.