My better half came home from work recently with a veritable mountain of blueberries that just needed to be used. And no, not planning on Blueberry pancakes. SOS as they say. So in my recent trend of making traybakes, I decided on making a beautifully coloured and blueberry filled bake. This cake is equally delicious made using fresh or frozen blueberries. And I’m sure, that it would be equally as good with blackberries.