Step 1. Preheat the Oven and Prepare the Cake Pans

Preheat your oven to 180°C (350°F). Grease and line two 8-inch round cake pans with parchment paper.

Step 2. Cream the Butter and Sugar

In a mixing bowl, beat the softened butter and caster sugar together until light and fluffy, about 2-3 minutes.

Step 3. Add the Eggs

Add the eggs one at a time, beating well after each addition.

Step 4. Sift in the Dry Ingredients

In a separate bowl, sift together the self-raising flour, cocoa powder, and baking powder. Gently fold the dry ingredients into the wet mixture, being careful not to overmix.

Step 5. Add Milk and Mix

Add the milk to the batter and fold gently until the mixture is smooth and combined.

Step 6. Pour into Pans and Bake

Divide the batter evenly between the prepared cake pans, smoothing the tops. Bake in the preheated oven for 20-25 minutes, or until a skewer inserted into the center comes out clean.

Step 7. Cool the Cakes

Allow the cakes to cool in the pans for 10 minutes, then transfer them to a wire rack to cool completely.

Step 8. Prepare the Fudge Icing

While the cakes are cooling, heat the double cream in a saucepan over medium heat until it just begins to simmer. Remove from heat and add the chopped dark chocolate, butter, and golden syrup (if using). Stir until smooth and glossy, then let it cool until it thickens to a spreadable consistency.

Step 9. Assemble the Cake

Place one cake layer on a serving plate and spread a layer of fudge icing on top. Place the second cake layer on top, then spread the remaining fudge icing over the top and sides of the cake.

Step 10. Decorate and Serve

For an extra touch, decorate the cake with chocolate shavings, curls, or fresh berries. Slice and enjoy!