Directions:
- In an 8-quart pan, combine the blackberries, sugar, and butter.
- Over med-low heat, stirring constantly, heat the mixture until the sugar is completely dissolved.
- Increase heat to med-high and bring the mixture to a full rolling boil; stirring constantly.
- Stir in all the pectin; return mixture to a full rolling boil, stirring constantly.
- Boil, stirring constantly, for 1 minute.
- Remove pan from heat; skim off any foam.
- To prevent the jam from separating in the jars, allow the jam to cool 5 minutes before filling jars.
- Gently stir the jam every minute or so to distribute the fruit.
- Ladle the hot jam into hot jars, leaving 1/4 inch headspace.
- Wipe the jar rims and threads with a clean, damp cloth.
- Cover with hot lids and apply screw rings.
- Process half-pint jars in a 200° water bath for 10 minutes, pint jars for 15 minutes.
- Tip: after cooking blackberry jam, the center white cores of the berries, to which the individual seeds were attached, will rise to the surface of the jam; as you stir the jam during the 5 minute standing period before ladling it into the jars, you may skim off as many of these cores as you can find—purely optional, but recommended if entering this jam in a competition.
- Tip: you may use frozen blackberries—you will need 2 to 3 (16 oz.) bags; do not rinse frozen berries before defrosting, and be sure to add all of the released juice to the pan, or the jam will be too thick.
- Tip: To reduce the quantity of seeds in the jam, sieve about 1/4 of the berry pulp before measuring.
Nutrition Facts
| Amount Per 1 Serving | |||
| Calories | 883.84 Kcal (3700 kJ) | ||
| Calories from fat | 4.31 Kcal | ||
| % Daily Value* | |||
| Total Fat | 0.48g | 1% | |
|---|---|---|---|
| Cholesterol | 1.27mg | 0% | |
| Sodium | 5.71mg | 0% | |
| Potassium | 237.62mg | 5% | |
| Total Carbs | 224.54g | 75% | |
| Sugars | 213g | 852% | |
| Dietary Fiber | 7.34g | 29% | |
| Protein | 1.45g | 3% | |
| Vitamin C | 30.2mg | 50% | |
| Iron | 1.4mg | 8% | |
| Calcium | 44mg | 4% | |
| Amount Per 100 g | |||
| Calories | 244.37 Kcal (1023 kJ) | ||
| Calories from fat | 1.19 Kcal | ||
| % Daily Value* | |||
| Total Fat | 0.13g | 1% | |
|---|---|---|---|
| Cholesterol | 0.35mg | 0% | |
| Sodium | 1.58mg | 0% | |
| Potassium | 65.7mg | 5% | |
| Total Carbs | 62.08g | 75% | |
| Sugars | 58.89g | 852% | |
| Dietary Fiber | 2.03g | 29% | |
| Protein | 0.4g | 3% | |
| Vitamin C | 8.4mg | 50% | |
| Iron | 0.4mg | 8% | |
| Calcium | 12.2mg | 4% | |
* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.
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