Preserving Fresh Fig Jam
Preserving fig jam is a process of reducing fresh fruit with sugar and acid until it thickens into a dark, syrupy spread that sets firmly in the jar. You process the filled jars in a boiling water bath to ensure they remain shelf-stable for months.
Watch the pectin levels
Figs lack natural acidity, so you must add enough lemon juice to allow the fruit to set and to keep the jars safe for long-term storage.
- Heavy-bottomed wide pot
- Canning jars with new lids
- Water bath canner or deep stockpot with rack
- Jar lifter tongs
- Wide-mouth funnel
What goes in.
- 3 lbfresh figs, stemmed and quartered
- 2 cupsgranulated sugar
- 1/4 cupbottled lemon juice
- 1 tspvanilla extract (optional)
The Cold Plate Method
Keep a small plate in your freezer while the jam cooks. When the jam appears thick, dollop a small amount onto the cold plate; if it wrinkles when you push it with your finger, it is ready to jar.
The method.
Prepare the fruit
Place the quartered figs and sugar in your pot. Let them sit for 30 minutes until the sugar draws out the fruit's juices.
Slow cook
Bring the mixture to a boil over medium heat, then reduce to a simmer. Stir frequently to prevent the bottom from scorching.
Add acidity
Stir in the lemon juice once the figs have broken down and the mixture looks syrupy, usually after 30 to 40 minutes of simmering.
Final reduction
Cook until the jam darkens to an amber hue and passes the cold plate test. Remove from heat and stir in vanilla if using.
Jar and process
Ladle the hot jam into sterilized jars, leaving 1/4 inch of headspace. Wipe rims clean, screw on lids to fingertip tightness, and process in a boiling water bath for 10 minutes.
When it doesn't go to plan.
Discard any figs that have soft, grey mold around the stem, as one bad fruit can affect the entire batch.
Do not skip the lemon juice; it is the only thing standing between your jam and spoilage.
Let the jars sit undisturbed for 24 hours after processing to allow the set to firm up completely.
The ones that keep coming up.
Why is my jam still runny after cooking?
Figs vary in water content. If it doesn't pass the plate test, keep simmering on low heat; patience is more effective than adding thickeners.
Do I have to peel the figs?
No, the skins break down during the long simmer and contribute to the deep color of the jam.
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