Small-Batch Strawberry Jam
This is a low-fuss approach that relies on the fruit's integrity rather than added thickeners. You are looking for a vibrant, bright red set that tastes like summer in a jar.
Prioritize quality over yield.
Use berries that are just barely ripe; overripe fruit has broken-down pectin and will result in a runny product.
- wide, heavy-bottomed stainless steel pot
- potato masher
- small freezer-safe plate
- canning jars with new lids
- large spoon for skimming
What goes in.
- 2 lbfresh strawberries, hulled and quartered
- 2 cupsgranulated sugar
- 2 tbspfresh lemon juice
Checking the Set
Place a small plate in the freezer before you start. When you think the jam is ready, drop a teaspoon of it onto the plate; if it wrinkles when you push it with your finger, it has reached the proper gel point.
The method.
Macerate the fruit
Combine strawberries and sugar in the pot. Let them sit for at least 30 minutes until the sugar draws out the juices.
Bring to a boil
Add the lemon juice. Place over medium-high heat and bring to a rolling boil, stirring occasionally to prevent the sugar from scorching on the bottom.
Reduce and skim
Lower heat to medium and maintain a steady simmer. Skim off the foam that rises to the surface with a spoon to ensure a clear final product.
Cook to set
Continue cooking for about 15–20 minutes. Keep an eye on the texture; once the liquid looks syrupy and coats the back of a spoon, perform the plate test.
Jar the jam
Remove from heat immediately. Ladle into clean jars, leaving a half-inch of space at the top, and let cool completely before refrigerating.
When it doesn't go to plan.
Do not double the recipe; large batches take too long to boil down, which dulls the bright red color of the berries.
If the jam is still too runny after the plate test, add another teaspoon of lemon juice and boil for two more minutes.
Store jars in the back of the refrigerator where the temperature is most stable.
The ones that keep coming up.
Why is my jam brown instead of red?
You likely cooked it too long. High heat for too long causes caramelization of the sugar, which ruins the color and flavor of the fruit.
Can I use frozen berries?
Yes, but they hold more water. You will need to cook them for an extra 5–10 minutes to reach the same consistency.