Glace cherries Good quality fruit is bleached in a solution of water, calcium carbonate and sulphur dioxide until the fruit is colourless. The fruit is stoned and washed. Cherries are then soaked for a few minutes to soften the skin and flesh. After draining, cherries are immersed in weak syrup which is colooured usually red, but also green or yellow. The syrup strength is increased daily by boiling over a period of 9 days.