200 g of butter
60 g of salted herring fillets
mustard to taste
a little milk
STEP BY STEP RECIPE
Soak the herring in milk in advance, leave for 2 hours.
Wipe herring with a cloth and grind in a blender.
Add mustard and melted butter. Whisk everything together in a blender until smooth.
The butter is ready. Now you can put it in the refrigerator.