Blackberry Buttermilk Sponge

The sponge has a lovely crunchy demerara sugar topping

This easy to make blackberry buttermilk sponge has a lovely tender crumb and if you can get hedgerow blackberries the cake will taste even better. My blackberries came from the supermarket, they were absolutely fine (but make sure they aren't dessert blackberries) or raspberries would be good to use too. The sponge is best served warm and can be reheated gently in the microwave.

I know sometimes it's not convenient to buy buttermilk and a buttermilk substitute can be made by taking 250ml milk (not semi-skimmed) and pouring onto 1 tablespoon of either white wine vinegar or lemon juice and leave to stand at room temperature for 10 minutes.

Recipe is from The Great British Bake Off Everyday cookbook and they recommend serving the sponge with Hot Berry Sauce (recipe in the book). The cake is quite sweet and I think the berry sauce would counteract the sweetness. I served my cake with a dollop of cream.