In a heavy medium saucepan, combine sugar, cornstarch, and salt. Stir in milk. Cook and stir over medium heat until the mixture is thickened and bubbly. Cook and stir 2 minutes more. Remove from heat. Gradually stir about 1 cup of hot mixture into egg yolks. Return yolk mixture to saucepan. Cook and stir 2 minutes. Remove from heat.
Stir in butter and vanilla until butter melts. Pour mixture into a medium bowl. Cover surface with clear plastic wrap. To serve, spoon into dessert dishes.
Makes 4 servings.
Date: April 9, 2007