This simple strawberry jam is bursting with sweet, fresh flavor and made with just strawberries, sugar, and a squeeze of lemon juice—no pectin needed! You can use fresh or frozen berries, making it the perfect year-round recipe for homemade jam lovers.
If using fresh strawberries, hull and halve the berries. No need to cut them too small, you’ll be mashing them soon!
Put the berries, sugar, and lemon juice into a heavy based saucepan and toss to combine. If using fresh berries, crush them with a potato masher or wooden spoon, then turn the heat to medium and bring to a steady simmer. If frozen, heat over medium heat for about 20 minutes until the berries are thawed enough to mash.
Remove from heat, carefully mash the berries, then return the pot to medium heat and bring to a steady simmer. Once the berries are bubbling and simmering, increase the heat to medium-high. Cook for about 30 minutes, stirring occasionally, as the mixture goes from very liquidy to a more uniform jammy texture. As juices evaporate and the jam thickens, you’ll want to stir more often.
After 30 minutes, the jam should be close to done, so I like to stir constantly to prevent any burning in the last few minutes. The jam should be thick and bubble up slowly like lava.
Cook until you’re happy with the consistency. I drag my spoon against the bottom of the pan until I can see a strip of the pan. If the jam doesn’t run immediately back to cover the space, you know your jam is thick enough and it’ll set more once cool.
Take 2 jars (I've used 250mls here) and sterilise them with boiling water or run them through the dishwasher on a super hot cycle to ensure they are ready to use.While the jam and jars are still hot, use a stainless steel jam funnel to fill the jars, leaving around 1cm head room at the top. Seal the jars tightly.
Let the jars cool on the counter before transferring to the fridge. I don't can this jam, I just keep it in the fridge and it's fine this way. It lasts at least 2 months unopened and around 2 weeks once you open the jar.