Peach Blackberry Jam - cooking recipe

Ingredients

4 lbs peaches
1 quart blackberry
1 tablespoon lemon juice
5 1/2 cups sugar
1 teaspoon ground cinnamon
1 (1 2/3 ounce) box powdered fruit pectin

Preparation

Peel and chop peaches. Put peaches, blackberries and lemon into a pot, stir to coat the fruit with the lemon juice and bring to a boil over medium high heat.
Add the powdered fruit pectin and bring to a boil again. Add the sugar and cinnamon and bring to a hard, rolling boil. Boil for 15 minutes, stirring often.
Ladle into hot, sterilized 8 oz. jars and seal. Process in water-bath canner for 10 minutes.