8 cups blackberries
4 cups sugar
½ c. water
Place the berries in a large pot and cook over medium-low heat about 20 minutes until the berries are very soft. You can mash them up a bit to help them release their juice.
Run the berries through a food mill. Measure your pulp, return to the kettle and add the same amount of sugar. Put a ceramic saucer in the freezer (I’ll explain in a minute). Stir and cook over medium heat until the jam thickens. To test for thickening, take a spoonful and drip it onto your frozen saucer. This cools the jam very quickly and you can tell how thick it will be when finished. When it doesn’t run when you tip the saucer, it’s ready.
Take the jam off the heat, skim off any foam (I like to save this in a jar for my toast – tastes just as good as the jam, just not as pretty). Ladle into clean, sterilized jars leaving about half an inch of headroom. Seal with hot flats and bands and put in a boiling water bath for 10 minutes. Remove to a cutting board to cool. And get an immense amount of satisfaction as you hear the pings of your sealing jars.