are Triple Crown blackberries typical?
My only exposure to blackberries has been commercial jam until I grew my own TCs this year (I have been growing boysenberries for years). They are certainly black (when fully ripe) and they have a flavor that is quite distinct from a boysenberry.
I was surprised to see that they turn rather red when frozen and I just made a pie yesterday and it is alarmingly red. It tastes wonderful (company raved, as company will...) but it actually tastes more like boysenberry than the flavor of the uncooked TC blackberries (no, I labeled the freezer containers).
So, do they color commercial blackberry jam to make it look "black" or does freezing somehow radically alter the fruit?!