Small-Batch Strawberry Jam
This small-batch strawberry jam cooks up in a single saucepan with no canning gear or boxed pectin required. Macerating the berries in sugar first pulls out their juice, so the jam boils down glossy and bright with a soft, spoonable set and true fresh-strawberry flavor. A splash of lemon juice sharpens the sweetness and coaxes the fruit's natural pectin into a clean, gently wobbly gel.
Hull and halve 500 g strawberries, toss with 350 g sugar, 2 tbsp lemon juice, and a pinch of salt, then let them macerate 30 minutes until syrupy; meanwhile chill a small plate in the freezer. Bring the fruit to a gentle simmer to dissolve the sugar, then boil hard, stirring often and skimming any foam, mashing to the chunkiness you like, until it reaches 220°F/104°C or passes the wrinkle test. Ladle into clean jars, cool to room temperature, and refrigerate, where it thickens further as it sets.
- Macerate the berries with sugar for 30 minutes first so the jam sets brighter and needs less cooking down.
- Pull it off the heat at 220°F/104°C (or when a dab wrinkles on a frozen plate) so it stays soft-set, not rubbery.
- This is a fridge/freezer jam, not water-bath canned unless you process it, so keep jars refrigerated.
Equipment
- Heavy-bottomed saucepan
- Potato masher or fork
- Wooden spoon
- Instant-read thermometer
- Ladle
- Two 8-oz jars with lids
- Small plate for the freezer test
วัตถุดิบ
Jam
- 500 g fresh strawberries, hulled and halved, ripe but firm; slightly underripe berries add natural pectin
- 350 g granulated sugar
- 30 ml fresh lemon juice, from about 1 lemon
- lemon zest, optional, for brightness
- fine sea salt
วิธีทำ
- ขั้น01
Combine the strawberries, sugar, lemon juice, lemon zest if using, and salt in a heavy saucepan. Crush lightly with a potato masher, leaving some chunks, then let stand off the heat until the fruit releases its juice and the sugar looks wet and syrupy, about 30 minutes.
- ขั้น02
Slide a small plate into the freezer. You will use it later to check whether the jam has reached its set, so let it get properly cold while the fruit macerates.
- ขั้น03
Set the pan over medium heat and stir gently until every grain of sugar has dissolved, then raise the heat and bring the fruit to a full rolling boil that does not stop when you stir.
- ขั้น04
Keep it at a hard boil, stirring often so nothing scorches and skimming off any pink foam that rises. Mash to your preferred texture as it thickens. Cook until it reaches 220°F/104°C on an instant-read thermometer and the bubbles turn slow and glossy.
- ขั้น05
Spoon a little jam onto the frozen plate and wait one minute, then push it with a fingertip. If the surface wrinkles and it holds a line, it is done; if it floods back, boil another 2 to 3 minutes and test again.
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Ladle the hot jam into clean jars, leaving a little headspace. Let it cool to room temperature on the counter, uncovered, then cap and refrigerate. It will firm up considerably as it chills.
Make ahead
The flavor deepens after a night in the fridge, so it is a good jam to make 1 to 3 days ahead. You can also hull and halve the berries and macerate them with the sugar up to 12 hours in advance, kept covered in the fridge, then cook when ready.
Storage
Keep sealed jars in the refrigerator for up to 3 weeks. For longer storage, freeze for up to 6 months (leave 2 cm of headspace and thaw in the fridge), or process filled jars in a boiling-water bath for shelf-stable, canned jam.
Variations
Vanilla bean strawberry jam
Scrape the seeds from half a vanilla bean (or add ½ tsp vanilla bean paste) into the pan with the sugar. The warm, floral note rounds out the tartness beautifully.
Strawberry-balsamic black pepper
Stir in 1 tbsp good balsamic vinegar and a few grinds of black pepper during the last 5 minutes of cooking for a grown-up, savory-leaning jam that shines on cheese boards.
Lower-sugar version
To cut the sugar to 200 g, whisk in 1 tsp low-methoxyl (calcium-activated) pectin blended with a spoonful of the sugar; the jam sets without the extra sweetness but keeps a shorter fridge life of about 10 days.
Serve with
Nutrition per serving
Nutrition values are estimates based on the metric measurements. Adjust as needed.
คำถามพบบ่อย
Do I need store-bought pectin for this strawberry jam?
No. This small-batch strawberry jam relies on the fruit's own pectin plus the acid from fresh lemon juice to set. Strawberries are naturally low in pectin, so the trick is cooking to 220°F/104°C and including a few slightly underripe berries, which carry more pectin than fully soft ones.
How do I know when the jam is done?
Two checks agree: an instant-read thermometer should read 220°F/104°C, and a dab of jam on a frozen plate should wrinkle when you nudge it after a minute. If it still floods back into the gap, keep boiling and retest every couple of minutes.
Why is my strawberry jam runny?
Runny strawberry jam is almost always undercooked or short on acid. Return it to the pan, add an extra teaspoon of lemon juice, and boil until it reaches the set point. Remember it also thickens a lot as it cools, so judge the final texture after it has chilled, not while hot.
How long does homemade strawberry jam keep?
Stored in a sealed jar in the refrigerator, it stays good for about 3 weeks. You can freeze it for up to 6 months, or water-bath process the jars for a shelf-stable pantry version that lasts up to a year unopened.
Can I double the batch?
You can, but small batches are easier to control and set faster. If you scale up, use a wide, shallow pan so the extra liquid can evaporate, and expect a longer boil time to reach the same set point.
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