A straightforward recipe for making small-batch blueberry jam with options for low sugar and a hint of vanilla and lemon.
Author:zoe-thompson
Prep Time:15 min
Cook Time:30 min
Total Time:45 min
Yield:4 half-pint jars 1x
Category:Preserves
Method:Water Bath Canning
Cuisine:American
Diet:Vegetarian
Ingredients
Scale
4 cups fresh blueberries
2 cups granulated sugar (reduce to 1 cup for low sugar)
1/4 cup lemon juice
1 vanilla bean, split and scraped (optional)
1 tablespoon pectin (optional, for a firmer set)
Instructions
Wash blueberries and remove any stems.
In a large pot, combine blueberries, sugar, and lemon juice. If using vanilla bean, add the scraped seeds and pod.
If using pectin, stir it in now.
Bring the mixture to a boil over medium-high heat, stirring constantly.
Reduce heat and simmer, stirring occasionally, for 20-30 minutes, or until the jam has thickened. Mash some of the berries with a spoon if you prefer a smoother consistency.
If not using pectin, test for set by placing a small amount of jam on a chilled plate. If it wrinkles when pushed, it is ready.
Remove the vanilla bean pod if used.
Ladle hot jam into sterilized jars, leaving 1/4 inch headspace.
Wipe rims and secure lids. Process in a boiling water bath for 10 minutes (adjust for altitude if necessary).
Let jars cool completely before storing.
Notes
For a low-sugar version, use 1 cup of sugar. The jam may be softer.
For a vanilla-lemon twist, use the vanilla bean and lemon juice.
Ensure your jars and lids are properly sterilized for safe canning.