3 1/2 cup superfine flour(sifted)170 grams unsalted butter(room temperature)2 cup castor sugar3 large eggs6 tbsp red food colouring3 tbsp cocoa powder(sifted)1 1/2 tsp vanilla extract1 1/2 tsp salt1 1/2 cup buttermilk1 1/2 tsp white or apple vinegar1 1/2 tsp baking soda
