Yellow Jacket Cake Icing
["2 c. sugar", "2 Tbsp. corn syrup", "1/2 c. water", "2 egg whites", "3 egg yolks", "2 Tbsp. butter"]
["Cook", "syrup,", "sugar and water to 242\u00b0.\tWhip egg whites very stiff.", "In\tanother", "bowl beat egg yolks stiff.", "Combine the 2 and whip in syrup in thin stream.", "When stiff and ready to spread add butter. Keep vessel covered for first cooking of sugar to prevent crystallization on sides of pan."]
["sugar", "corn syrup", "water", "egg whites", "egg yolks", "butter"]