Chocolate Pie
["1 c. sugar", "4 Tbsp. cocoa (level)", "4 Tbsp. flour (level)", "3 egg yolks", "1/4 stick margarine", "1 1/4 c. sweet milk", "1 tsp. vanilla", "1 (9-inch) pie shell, baked"]
["Combine sugar, cocoa, flour and 1/4 cup milk.", "Mix well and add eggs and remaining milk, butter and vanilla.", "Cook in a double boiler until thick."]
["sugar", "cocoa", "flour", "egg yolks", "margarine", "sweet milk", "vanilla", "pie shell"]