If making raspberry jam, it's crucial to use sterilised jars to store it. To clean the jars, preheat the oven to 140C/120C Fan/Gas 1. Wash the jars well in warm soapy water then rinse thoroughly ...

Variation: Raspberry And Kirsch Jam: Make the jam as above, stirring in 2 to 3 tablespoons Kirsch (or to taste) to the jam just after setting point has been reached. Recipe from Jam, Jelly ...