Doesn't the large iridium quality milk recover around the same amount? Am I missing something?
Yeah... I was actually talking about large iridium quality goat milkI second cheese, preferably gold star. So any large milk works.
I'm not sure I understand your question, the numbers for milk and cheese are both in the post you replied to...

Then you're right, large iridium quality goat milk has almost the same stats as gold cheese.
Cheese has the advantage of being available every day, while goats produce every second day, and even at full hearts, in my experience they don't consistently produce iridium.
Cheese has the disadvantage if process time and needing a machine, but it's not too difficult to get.