format by Ursula R. Taylor. Place egg white and glucose in a bowl. Add the powdered sugar and mix together with a wooden spoon. Knead with the fingers until the mixture forms a ball, then knead on a surface dusted with powdered sugar until smooth and free from cracks. Wrap in plastic wrap, and place into a plastic bag, then place into a air-tight container. Will keep up to 3 months. If it is hard after a long period of storage, pick off very hard edges, then knead small amounts at a time until you have the amount you wish to use.