Ingredients:
180g butter, softened at room temperature
120g caster sugar, divided
160g self-raising flour
4 large eggs, separate
150g 70% dark chocolate, chopped
90g fresh milk
90g hot water + 2 tbsp instant coffee granules
- Preheat oven to 160°C. Line the base of a 20cm round pan.
- Place chocolate in a bowl over a small saucepan of simmering water, ensuring the bowl doesn't touch the water. Stir occasionally until chocolate is melted and smooth. Remove bowl from the heat and set aside.
- In a clean, oil-free mixing bowl, beat egg whites using an electric mixer until soft peaks formed. Gradually beat in half the sugar until stiff peaks formed. Set aside.
- Using the same beaters, cream butter and remaining sugar until light and pale in colour.
- Gradually add in egg yolks, one at a time, beating well after each addition. Add in melted chocolate and mix until combined.
- Add in sifted flour and milk mixture in 3 additions, starting and ending with flour. Combine until just incorporated.
- Finally, fold in beaten egg whites in 3 additions, ensuring the batter is well mixed.
- Scrape the batter into the prepared pan and smooth the top with the spatula.
- Bake at 160°C for about 1 hour or until a skewer inserted into the centre of the cake comes out clean.
- Stand the cake in the pan for 10 minutes before turning out onto a wire rack to cool.