To make the cake, place all of the cake ingredients, except the boiling water, into a large mixing bowl. Using a wooden spoon, or electric whisk, beat the mixture until smooth and well combined.
Grease two 20cm/8in cake tins and line the bases with baking paper. Sift together the flour, cocoa, bicarbonate of soda, baking powder and salt. In a jug, whisk together the buttermilk and food ...