The phrase
"blackberry mixture" refers to a blend or combination of blackberries. It typically implies that the blackberries have been mashed, crushed, or mixed together to create a unified, homogeneous mixture.
Full definition
Pour cake / butter crumble mixture over
blackberry mixture in crockpot, and spread out evenly, and cover crockpot with lid.
Place the squares on the parchment paper and add a slice of brie cheese and top with 1 tablespoon
of blackberry mixture (reserve additional berries)
... bring it together Once the coconut mixture has cooled for long enough, add half
the blackberry mixture.
It all starts with a chia seed -
blackberry mixture to create the fruity filling.
Gently fold in
blackberry mixture; pour into prepared crust.
Drop the biscuit dough into
the blackberry mixture in 2 tablespoon portions (this doesn't have to be exact but don't use too much more dough for each drop biscuit or it will take longer to bake.