Chocolate Cream Pie
["1 1/2 c. sugar", "1 sq. chocolate (3 oz.)", "1/2 tsp. salt", "3 Tbsp. cornstarch", "3 Tbsp. flour", "3 c. milk*", "3 egg yolks, slightly beaten", "1 Tbsp. butter", "1 1/2 tsp. vanilla"]
["*Use 1 cup evaporated milk (undiluted) and 2 cups plain milk."]
["sugar", "chocolate", "salt", "cornstarch", "flour", "milk", "egg yolks", "butter", "vanilla"]