Below is a tried-and-true recipe for a simple berry jam. Our family favorite is blackberries as the color of the jam is nearly as delicious as its taste when spread on warm toast. You’ll need the following:
- 2 cups blackberries (or try raspberries or strawberries)
- 2 cups sugar
- 2 teaspoons lemon juice
- 1 slice of lemon rind
- Apple slice
- Canning jars and tongs
Crush the berries with a potato masher, softly, not too hard. Place all the ingredients in a stockpot and boil over high heat for five minutes, stirring the mixture to prevent it from sticking or burning. Reduce the heat to medium-high and continue to boil and stir. Remove any foam with a large spoon. After a half hour, the jam will begin to thicken up. If your jam is setting slowly, you can add more lemon juice or a slice of apple. Pectin, which is regularly used thicken jams and jellies, is made from apples. Thus, a slice of apple will serve the same purpose.
When the jam is ready, pour it into sterilized jars. The jars should be warm when the jam is added, so keep the sterilized articles in the oven, dishwasher, or canning water bath until you need them; ditto the lids and rings. Make sure to leave a generous half-inch gap between the jam and the top of the jar—this is known as headspace in the world of jam. Place the lids on the jars and screw them on firmly.
Place the sealed jars into the water bath and cover with at least an inch of water. Boil for ten minutes. Using jar tongs, carefully lift the jars out of the water bath and let them cool at room temperature. You will hear the lids seal when they make a popping noise as the domed lid is sucked down. Processed jam will last at east a year and makes a lovely gift. For small batches, you can make your jam and store it in the fridge as soon as it has cooled off. Berries contain protection magic as well as that of abundance. Folklore says vampires are afraid of blackberry vines.