Microwave Chocolate Pie
["2 Tbsp. cocoa", "3/4 c. sugar", "4 Tbsp. cornstarch", "3 egg yolks, beaten", "2 1/2 c. milk", "1 to 2 Tbsp. margarine", "1 tsp. vanilla"]
["Put in microwave-safe large bowl and cook 6 minutes.", "Stir. Cook another 4 minutes.", "Add margarine and vanilla.", "Pour into prebaked crust or graham cracker crust and store in refrigerator."]
["cocoa", "sugar", "cornstarch", "egg yolks", "milk", "margarine", "vanilla"]