How to prepare
Sort through to see if there are any soft or mouldy berries and remove them. Only wash before you are ready to eat. But you should try to eat as soon as possible or within a few days.
You should store the blackberries in a low-humidity, low-moisture part of your fridge, such as the middle rack.
They are suitable for freezing but to avoid them clumping together you should flash freeze them first. Wash and dry thoroughly then place on a baking sheet and place in the freezer for about 3 hours. Then take them out and transfer to another airtight container where they should keep for up to 6 months