Made From Scratch Chocolate Pudding

1 cup white sugar

2 tablespoons cornstarch

1/4 teaspoon salt

2 cups milk

2 (1 ounce) squares unsweetened chocolate, chopped

2 egg yolks

2 tablespoons butter

2 teaspoons vanilla

In a medium saucepan over medium heat, combine sugar, cornstarch and salt. Stir in milk and chocolate. Cook, stirring constantly, until chocolate melts and mixture thickens. Remove from heat and stir in egg yolks. Return to heat and cook 2 minutes more. Remove from heat and stir in butter and vanilla. Chill before serving.