Icing.
1 egg white.
1/2 pint of powdered sugar.
1 teaspoonful of water.
1 teaspoonful of lemon juice, or 1/2 teaspoonful of vanilla.
Put the unbeaten white of the egg into a bowl, and gradually beat into it the powdered sugar. When smooth and light, add the water and sugar. Spread smoothly on the cake and let it stand in a cool place until it hardens. If in a hurry to have it harden, omit the water.