2/3 c. sugar
1/2 tsp. salt
2 1/2 tbsp. cornstarch
1 tbsp. flour
1 tsp. vanilla
3 egg yolks, beaten
3 c. milk

Mix in saucepan sugar, salt, cornstarch, and flour. Stir in gradually 3 cups milk. Cook over moderate heat, stirring constantly, until mixture thickens and boils. Remove from heat. Slowly add 1/3 of the mixture and blend into the egg yolks. Then add back to rest of mixture. Cook 1 more minute over heat. Remove and add vanilla. Refrigerate after cooling down. This can now be spooned into Cream Puffs.