The easiest method is to multiply each ingredient by the number of servings you want to make. Start by separating the eggs and beating both the yolks as well as the whites until foamy. Then to the yolks, add any extra sweetener while stirring. Continue stirring and the liquor slowly, followed by the sherry. Next, add the cream and milk and then fold in your egg whites. Top with your freshly grated nutmeg.