180 Frosting for Cake
Allow for each loaf of cake, the white of one egg, and ten heaping tea spoonsful of powdered double refined loaf sugar. Beat the eggs on a shallow plate till you can turn the plate upside down, without the eggs dropping from it. Then stir in the sugar very gradually; stir it without any cessation for fifteen minutes, then add a tea spoonful of lemon juice, vinegar will do but it is not as good as the lemon juice. If you wish to have it colored, stir in a few grains of cochineal powder, or a little powder blue. As soon as you have put in the lemon juice, lay it with a knife, on the cake, which should be hot, smooth it over, and set the cake away in a cool place, and let it remain, until it hardens.