Posted: 28/06/2013 at 10:35
I have never heard of an electric jam maker, but it is so easy and quite quick to do and such a labour of love.
I am no expert and only do a few pots a year so someone may give much better advice
I simmer fruit, but not for too long as I like chunky jam, add same weight of normal granulated sugar and juice of a lemon. Sometimes if I am feeling posh I use preserving sugar. Simmer and stir gently until sugar not crunchy under wooden spoon and then blast with heat and boil. When it passes the finger test its done and avoiding third degree burns pour into clean jars.
Finger test...put blob of jam onto cold plate and push with finger, after blowing on it, if it wrinkles its done.
Apologies if I have insulted your intelligence with the above, but that is how I do jam.