I am fortunate enough to have a grape vine growing well in my garden and love eating the fresh grapes each summer, this summer however has delivered a bounty of grapes...too many to eat and I hate seeing the wasps eating them. So I have discovered how to make Grape Jam from an old 1970's Woman's Weekly Cookbook. I have tweaked this recipe all summer and have found a happy medium between the Seventies and the Modern Day.
1 kg of Grapes, either Red or Green.
1 1/2 cups raw sugar
1/2 a lemon or orange sliced thickly.
I have seeded grapes growing in my garden, so I have found it best to de-seed before cooking, this takes a little bit of time, but the alternative is fishing them out whilst cooking. No...not fun. So de-seed your grapes into a large pot, the larger the better as the jam froths up quite high. Add your sugar and citrus and stand for 20 minutes to macerate the fruit. This extracts all the liquid so you bypass the need to add water to the cooking process (as the 1970's version suggested) When the mix is nice a moist put is on the stove top to boil. Boil and stir for 20 minutes or until it has reduced somewhat. It will get thicker and more gelatinous as it cooks. Remove the Lemon or Orange. You need a little bit of citrus to help the jam set, the grapes are quite high in Pectin which helps the jam to set also. No need for special Jam Sugar or adding Pectin to this one.
The fine line with making jam is not that fine really. You see it thicken and put a teaspoonful on a plate, if it is not too runny then it is ready to bottle.
This recipe makes one jar and it is usually eaten rather quickly so I don't sterilise properly. I just have a clean jar and pour boiling water into it while I cook the jam. If you where planning on storing the jam then Google one of the billion sterilisation methods.