sugar thermometer<\/a>, 104\u00b0C is the perfect temperature to cook jam. <\/p>\n\n\n\nThere is a manual way to test the doneness of your jam. Before you start cooking, place a small plate in the freezer. Once your jam is cooked, spoon a small amount of the jam on the chilled plate. The jam cools quickly and thickens almost instantly. Use your fingertip to press into the jam. When it\u2019s cooked right, you should see the surface wrinkles. If it doesn\u2019t, simmer the jam for another 5 to 10 minutes.<\/p>\n\n\n\n
Sterilising jars<\/h2>\n\n\n\n
Sterilising is an important process when preserving food. This action is required to remove all bacteria, yeasts, fungus and organisms from the jar.<\/p>\n\n\n\n