01 -
Preheat your oven to 180ºC/160ºC fan and line a 2lb loaf tin.
02 -
Beat together the unsalted butter and light brown sugar until light and creamy. Add in the self-raising flour and medium eggs, then beat again. Mix in the dissolved coffee.
03 -
Stir through the chopped walnuts and pour the batter into the lined tin. Bake the cake for 55-65 minutes. Once baked, leave to cool fully.
04 -
Beat the unsalted butter on its own to loosen. Add the icing sugar and beat together. Mix in the dissolved coffee.
05 -
Transfer the buttercream to a piping bag and decorate the cake. Add some chopped walnuts and sprinkles. Serve and enjoy.