This section is from the book "Cooking For Profit", by Jessup Whitehead. Also available from Amazon: Cooking for Profit.
4 tablespoons powdered sugar.
Put the sugar in a cup and mix it with the white of egg. As soon as the sugar is fairly wetted it is ready. It dries pearl white; takes but a minute to make. Spread it all over the bottom and sides of "angel food."
Cost of material 15c, size 1 quart; weight 15 oz.
The rule for the foregoing in large quantities is an ounce of sugar to each ounce of white of eggs and half as much flour. Those who deal in it largely say it is, or at least was before they got it into a regular routine, the most troublesome cake they made, the tendency being always to fall in the middle. They now use plain deep molds having centre tubes of unusually large size. There is no difficulty with small cakes. But the whites must be whipped quite dry in a cold place.
 
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