Easy Chocolate Pie
["1 1/2 c. sugar", "1/2 c. cocoa", "7 Tbsp. cornstarch", "4 c. milk", "4 egg yolks, well beaten", "2 tsp. vanilla", "1/2 stick butter"]
["Combine first 5 ingredients.", "Cook until thick and bubbling. Add butter and vanilla.", "Makes 2 pies.", "For meringue, use egg whites."]
["sugar", "cocoa", "cornstarch", "milk", "egg yolks", "vanilla", "butter"]