Hi,
I found the following sentence in the recipe.
#1 Put in some milk if you like.
I wonder if "put" can be used for liquid like milk.
Is "pour" a right word?
'Pour' is a more precise word. However, 'put in' here really just means 'add', so it's OK.
In spoken English, we use a handful of small words like put, get, make and do a great deal.
Best wishes, Clive