A very rich, dark-chocolate ice cream, with a liqueur-like flavor from the raspberry syrup.
Scald the milk. Sift the cocoa and mix thoroughly with salt, sugar, and cornstarch in top of double boiler. Add the milk, and cook over boiling water for 20 minutes, stirring constantly until thickened, and then occasionally thereafter. Pour over well-beaten egg yolks; cool. Add beaten egg whites, whipped cream, vanilla, and syrup. Freeze. Beat when partially frozen. (If frozen in an ice cream freezer, do not whip the cream.)