Chocolate prune cake

When I was a child, my aunt used to make a pudding called 'sticky prune cake'. It was always greeted rapturously, not least because we children promptly rechristened it 'stinky poo cake'. A sugar high combined with lavatorial humour; what more could one wish for as a pre-teen?

The combination of chocolate and prunes was a rich and delicious one, scatological references aside. I felt nostalgic and so set about reinventing it; this version is a basic almond sponge (beaten egg whites provide the lift that in a regular sponge is created by baking powder and gluten), melted chocolate instead of butter, and chopped prunes. Moist and brownie-like. And still relatively low carb; less than 10g for a medium slice (and about 15g fat and 6g protein).