Orange- and lemon-flavoured sugars used in place of ordinary sugar give a real fruit flavour to recipes. Grate the orange or lemon rind on the finest possible grater and mix it with castor sugar allowing 100g(4 oz) sugar for each fruit used. Using a wooden spoon, work the sugar and zest together. The sugar will take on the colour and absorb the flavouring oils of the fruit. Spread the sugar out on a square of greaseproof paper or foil and set in a warm place to dry. Crush any lumps or sieve if necessary, store ready to use in a covered jar. Follow your own recipe for a sandwich layer cake and use flavoured sugar instead of ordinary castor sugar. Use lemon sugar to flavour apples in apple pie and orange sugar to sweeten any dessert recipe using rhubarb. Either is good sprinkled over pancakes.