Pull all the stems of the fruits and put them into a large saucepan.
Heat it over medium heat and crush the berries to squish out the juice.
Bring it to a boil then add the sugar and lemon juice.
Reduce the heat and stir the mixture until the sugar dissolves.
Bring it back up to the boil for a few minutes and then bottle and seal the jam.
Store it in a cool, dark place and it should keep up to 2 years.
Notes
Equipment:
Glass jars - you can use recycled jars but it's best to buy new lids if you want to store the jam rather and consume short term. Here's how to sterilize glass jars (without an oven).
Jar lifter - they're basically tongs with rubber coating so you don't burn your fingers. Optional.
How to wash wild mulberries:Fill a sink with water, adding a few tablespoons of apple cider vinegar and soaking them for about 15 minutes (swish it around a few times with your hands). Then scoop all the berries into a sieve and give them a good rinse before you use them. If you’re not going to use them right away, lay them out flat on a tea towel and let them dry completely then store in the fridge in a tea towel lined bowl or container.