Ingredient:
1 tsp superfine sugar
1 (1/2 ounces) desired liquor brandy, sherry, port, and so forth
1/2 ounce heavy cream optional
1 small egg
Freshly ground nutmeg

Method:
Shake the liquor, egg, sugar, and cream very well with ice to emulsify the egg; then strain into a sour or wine glass. Dust with nutmeg.