do you put it in AFTER it is finished cooking?
Definitely put it in after. Heating protein makes it.... meally (is that a word) It gets a funny and not tasty consistency.
I guess I would need to know the oatmealowder ratio then
This will depend upon what you need, and how big you are.
I use 1 cup of oatmeal, 1 scoop muscle milk, one scoop of protein, 1 cup berries, and whatever milk I need to get the consistency I want.
That being said, I am 275lbs (125kg) So you will eat less if you are smaller.