Melt chocolate; add hot water. Mix sugar and cornstarch, add yolks of eggs and milk, and cook in double boiler until mixture thickens, stirring constantly. Add flavoring, salt, and chocolate mixture.

Simple Chocolate Filling

Melt chocolate, add remaining ingredients except flavoring, and cook in double boiler until it thickens, stirring constantly. Cool and add flavoring.

One cup chopped nuts or one cup shredded cocoanut or one cup mixed fruit may be added to this filling.

Cocoa Nougat Filling

Mix nut meats, egg yolk and powdered sugar; add cream beaten until stiff. Boil sugar and hot water until a thread is formed. Pour sugar mixture on to slightly beaten white of egg; add cream of tartar and flavoring, and beat until thick enough to spread. Add nut mixture, beat well, and spread over cakes.

Note.—If this mixture becomes too thick, it may be thinned by adding a small quantity of hot water.