Clean the fish
Scrape the scales off the herring. Then remove the insides and cut off the head. Wash and rinse the herring in cold water and dry it lightly with a paper towel.
Loosen the backbone
First, cut into the belly of the herring on both sides of the backbone.
Remove the bones
Cut out the backbone.
Clean-cut herring fillet
When herring is filleted in this way, it is referred to as a butterfly fillet.