Butter two 20cm Victoria sponge tins and line the bases with discs of non-stick baking paper. Combine the milk, instant coffee and ground coffee in a saucepan and bring to the boil, then remove from the heat and leave until warm. Beat the butter, brown sugar and caster sugar together until light and fluffy, then beat in the eggs, one at a time.
Beat in the coffee mixture until evenly combined. Sift the two flours and baking powder together two or three times, then beat this through with the chopped Brazil nuts. Divide the mixture between the tins, heat the oven to 180°C (160°C fan-assisted) and bake for 25-30 minutes or until a toothpick inserted comes out clean. Fill and top with coffee water icing.
200g Icing sugar, sifted 75ml Boiling Water 3 tsp Instant coffee ½ tsp Grated lemon zest
Method
Place the icing sugar in a bowl, drizzle in a quarter of the water and stir together. Leave a minute, lift spoon out; it should run off in thick ribbons. If not, add small amounts of water to achieve correct consistency, taking care not to overdo it.