Line two 1lb loaf tins with non-stick baking paper.
Put all of the ingredients, except the blackberries, blood oranges juice and last 56g of caster sugar into a large bowl and beat together with an electric hand whisk or mixer, until smooth and combined. Stir in blackberries by hand. If you toss them in a little icing sugar before adding them, it will stop them from sinking to the bottom.
Pour the mixture into the prepared tins and smooth the top.
Bake in the middle of your preheated oven for 50-60 minutes until a skewer comes out clean when inserted into the centre of the loaves.
Leave to cool in the tins. While the loaf is cooling, mix together the blood orange juice and 56g of caster sugar. Poke deep holes into the loaves using a skewer and spoon the mixture over the top of the cakes. Leave to cool in the tins completely before turning out.
Enjoy one of the cakes and give the other away for good karma and happy friends.
