When making jams, jellies and marmalades at home, heating and mixing large quantities of fruit and sugar can be problematic, as sugar may burn, fruit may not cook evenly etc. This will ultimately affect the quality of your homemade goodies. CSR Jam Setting Sugar has been formulated specifically for small batches made at home – 1kg of setting sugar = 1 batch. You may double up on batches (i.e. 2kg setting sugar, 2kg cleaned fruit per batch made), however do not exceed this, as the quality and set of your jams and marmalades may be affected.