To start, put water, sugar, and blackberries in a medium saucepan and bring to a boil. Once boiling, lower heat and let mixture simmer for about 15 minutes until blackberries are softening and ...

Rather than waiting for the fruit juice to boil in the oven—which activates the cornstarch’s thickening power—this recipe jump-starts the process. The berries are tossed with sugar and left ...

Place the blackberries and lemons in a nonreactive pot with the pectin and butter, and bring to a strong boil. Add half the sugar. When the mixture shows further signs of beginning a second boil ...