I was cooking a cod with steam, but unexpectedly a lot of foam came out. First, I thought that the pot has not been cleaned but after re-cleaning the pot and refilling the water the situation repeated. My fish is surrounded by foam (like from the dish soap) instead of the pure steam. Any idea what is going wrong?
The fish was bought in the supermarket as "fresh" (not frozen), looked and smelled normally.
Best Answer
This sounded quite normal. Steam condensing on your fish is washing small amounts of protein into the steaming water below. It is quite harmless. As mentioned in my comment above, most of us have experienced that when boiling cold eggs too quickly causing the shell to crack and some egg white to leak into the water. That always make at least a bit of foam and often enough to overflow that pan.
There are a couple of things you can do to minimise that:
More water in the pan and a gentler boil might help too