In a heavy bottomed stock pot, melt butter and saute onion, celery, and whites of scallions. Cook briefly then add flour and stir for approximately 5 minutes. Add sherry, stir together, then add cream and milk and whisk until smooth. Allow to simmer for about 15 to 20 minutes. Add salt, pepper, hot sauce and oysters. Bring to a slight simmer. Remove from heat and stir in parsley and scallion tops. Serve the soup topped with a dollop of whole butter.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.