On Saturday, I made blackberry-black raspberry jam and canned three 8 oz. jars and one 4 oz. jar. When I de-seeded the blackberries I picked on Wednesday, I only had three cups of pulp, so I added a half cup of black raspberries that I had frozen, which gave me the 3 ½ cups I needed. Tomorrow, I will go back to our woods to pick more blackberries. Our terrace has some but not in abundance.