Best Ever Chocolate Cream Pie
["1 1/4 c. sugar", "1/2 c. all-purpose flour", "1/4 c. cocoa", "dash of salt", "4 egg yolks", "2 c. milk", "1/4 c. margarine", "1 tsp. vanilla", "1 (9-inch) pastry shell, baked"]
["Combine sugar, flour, cocoa and salt in saucepan and set aside.", "Combine egg yolks and milk and stir into sugar mixture. Add margarine.", "Cook over medium heat, stirring constantly, until mixture thickens and boils.", "Remove from heat.", "Stir in vanilla. Spoon into pie shell."]
["sugar", "all-purpose", "cocoa", "salt", "egg yolks", "milk", "margarine", "vanilla", "pastry shell"]