Rinse blueberries and remove stems and any bad blueberries. Place the blueberries, sugar, lemon juice, and spices in a large pot and stir.
Bring to a boil over medium heat then lower heat slightly so it simmers gently. Cook for about 15-20 minutes or until the mixture coats the back of a spoon. Mash some of the blueberries with a potato masher or the back of a spoon as it cooks.
Remove from the heat and pour into clean jars. Since the jam will only last about 2 weeks in the fridge, I like to use 4-ounce jars so I can freeze them and take them out as needed. Let the mixture cool to room temperature then cover and refrigerate.
Let it chill for 24-48 hours to set then freeze extra.
Makes about 2 cups or 16 ounces.
Notes
STORE/FREEZEStore the jam in clean jars in the refrigerator for about 2 weeks.Freeze the jam in freezer-safe jars or containers, leaving a little room for expansion. Frozen jam keeps well for up to 6 months. Thaw it overnight in the refrigerator before using.