Great-Granny'S Basic Cream Pie
["3/4 c. sugar", "6 Tbsp. flour", "dash of salt", "3 egg yolks", "1 tsp. vanilla", "1 pat butter", "2 1/2 c. milk"]
["Options:", "Cocoa added for chocolate cream pie.", "Coconut added for coconut cream pie."]
["sugar", "flour", "salt", "egg yolks", "vanilla", "butter", "milk"]