I make jam. A few years back I used to make a lot of it. As a novice jam maker, I did what any naive beginner does: I attacked the world of summer fruit with gusto. Raspberries. Strawberries. Peaches. Anything I could get my hands on was boiled up with sugar and stuck in jars. I even made fancy labels. My jam cupboard is still full of dark, sticky mysteries from that period of my life.
What nobody tells you about jamming is the sheer danger involved. It’s lethal. I embark upon each batch with trepidation.
To get a jam to set, particularly the jelly-based ones like marmalade, you heat the fruit juice and sugar up to a rolling boil. Then you keep boiling it to reduce the liquid down until the setting point is reached; when a drop of jam placed on a cold ceramic saucer quickly sets and turns to jelly.
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