Chocolate Pie
["3/4 c. sugar", "1/4 c. cocoa", "2 1/2 c. milk", "6 Tbsp. flour", "1/2 tsp. salt", "2 Tbsp. butter", "1 tsp. vanilla", "3 egg yolks, slightly beaten"]
["Mix cocoa, sugar, flour, salt and milk in top of double boiler.", "Cook until mixture begins to thicken.", "Add a little of the mixture to egg yolks.", "Then add to mixture and cook about 3 minutes longer.", "Remove from heat.", "Add butter and vanilla.", "Pour into baked pie shell.", "Top with meringue."]
["sugar", "cocoa", "milk", "flour", "salt", "butter", "vanilla", "egg yolks"]