I have been making jam for the past few years and I have tried several times, without success, to make rhubarb jam. Instead of a lovely soft jam, I end up with a sort of burnt rhubarb “toffee”. I hate to throw away any food but it really has been inedible. But this year, inspired by Frugal Feeding’s rhubarb and ginger jam post, I thought I would give it another go.
So although I didn’t have any ginger (or jam sugar), I followed the cooking instructions and I now have some truly delicious rhubarb jam. At last!
A lot of jams work on a ratio of 1:1 in weight of prepared fruit to sugar. This is no exception. Rhubarb is not typically very high in pectin which is why it can help to use jam sugar, which is sugar with added pectin. Alternatively you can add liquid pectin or just add some lemon juice, which is what I did. As I prefer soft set jams anyway I don’t mind if it is not particularly well set. I had 800g of rhubarb so used 800g of sugar and the juice of a couple of lemons. If you like rhubarb and ginger jam (and actually have some ginger!) Frugal Feeding’s recipe sounds great so check it out.
I chopped the rhubarb and then added the sugar and lemon juice as instructed:
You need to leave it for a couple of hours, until the sugar has mostly dissolved:
Bring it to the boil, then turn down the heat and simmer. It will take around 40 minutes for the fruit to soften properly. The jam should be ready when the temperature gets to 104ºC. If you don’t have a jam thermometer you can test for a set by dropping a few drops of jam onto a cold saucer. Let it cool for a moment and if it starts to wrinkle when you push it gently with your finger it is ready. You may need to turn up the heat once the fruit is softened, just to get it to the right temperature for a set.
My jam isn’t the beautiful pink colour of Frugal Feeding‘s rhubarb jam because my rhubarb wasn’t particularly pink when I started but it still tastes great. I am so pleased to have finally mastered rhubarb jam. Now I just need to make some successful strawberry jam…