• 1 c. sugar
• 1/2 c. water
• 1 egg white
• Pinch of cream of tartar

Put the sugar and water to cook in a saucepan. Boil until a fairly hard ball is formed when the sirup is tried in cold water or until it threads when dropped from a spoon, as shown in Fig. 25. If a thermometer is used to test the sirup, it should register 240 to 242 degrees Fahrenheit when the sirup is taken from the stove. Beat the egg white, add the cream of tartar, and continue beating until the egg white is stiff. Then, as in Fig. 26, pour the hot sirup over the beaten egg white very slowly, so as not to cook the egg, beating rapidly until all the sirup has been added.

Continue to beat with a spoon or egg whip until the icing is light and almost stiff enough to spread on the cake, as in Fig. 27. Then place the bowl over a vessel containing boiling water, as in Fig. 28, and beat for 3 or 4 minutes while the water boils rapidly underneath. With this treatment, the icing will not change in consistency, but will become easier to handle and will permit of being used for a longer period of time without becoming hard. In fact, it may be kept until the next day if desired by placing a moist cloth over the top of the bowl so as to prevent a crust from forming.

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