WHAT YOU DO
Step 1. Start by making the crumble topping. Mix all the dried ingredients together and add the melted butter then mix lightly, using a fork to create a crumb like texture. Set aside.
Step 2. Preheat the oven to 180C, and butter and flour the cake tin.
Step 3. To make the cake, in a mixer beat the butter and sugar until light and fluffy. Add the eggs and keep beating – if the mix looks like it will curdle a bit, just add a tablespoon of the flour.
Step 4. Mix in the sour cream and vanilla extract then fold in the dried ingredients (flour, baking powder and bicarb), and add the berries. Pour into a cake tin, top with the crumble mixture and bake for about 45 minutes until a knife comes out clean. Cool fully and then serve with a dollop of cream – you can serve with extra blueberries and some icing sugar on top if you like.
Recipe by Domini Kemp, photo by Dean Carroll