Add the
shrimp to the
soup and stir to
cook, about 2 minutes. Strain the
soup from the solids. Transfer the solids to a bowl and keep
warm in the oven. Return the
soup to a saucepan and bring to a boil. Reduce
soup to about 100 milliliters. Whisk in the remaining 50 grams of
butter.
Season the
soup with
salt and
pepper.