Combine cinnamon, mace, white pepper, nutmeg, coriander in a skillet and heat and cook shaking until aromatic. Cool then grind to a powder.
In a medium saucepan, add milk, vanilla seeds and about 1 tablespoon of the pepper mixture. Turn heat to medium and boil, stirring.
Beat yolks and sugar until thick. Stir 1/2 cup of the hot milk into the yolk mixture and beat. Stir warmed egg mixture back into the milk. Heat, stirring constantly, until thick. Add more pepper mixture, if necessary. Cool and strain and freeze in ice cream machine.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.