*½ cup buttermilk120g -- use ½ cup milk + ½ tablespoon vinegar to make your own
1tspinstant coffeecan be reduced to ½
¼cupboiling water60g
¼cupcocoa powder25g
For Fudge frosting
90 gms Unsalted butter
1/3cupWater
1/2cupCaster sugar
1.5cupsIcing sugar
1/3cupCocoa powder
Instructions
Pre-heat your oven to 350F (conventional) and prepare a 9" cake pan with parchment paper and butter / oil
If making your own buttermilk, mix ½ cup milk with ½ tablespoon vinegar, stir, and set aside
Mix the flour, sugar, baking powder, baking soda, and salt in a bowl. Sift the ingredients to make sure there are no lumps
Break in the egg, and add the vegetable oil and buttermilk. Use a whisk to gently mix until the ingredients come together
In a smaller bowl, mix boiling water with cocoa powder and instant coffee, and whisk until you get a shiny mix. This step blooms the cocoa powder and brings out its lovely chocolatey notes.
Add the bloomed cocoa powder mix to the cake batter, and gently fold until combined
Pour the batter into the prepared pan
Bake at 350F for about ~20-25 minutes until a toothpick inserted into the center comes out with moist crumbs attached
Wait 10 minutes and then turn out the cake onto a wire rack. Let the cake cool completely and do the icing.
For the Fudge Icing:
Combine butter, the water and caster sugar in small saucepan; stir over heat, without boiling, until sugar dissolves. Sift icing sugar and cocoa powder into small bowl then gradually stir in hot butter mixture. Cover; refrigerate about 20 mins or until frosting thickens. Beat with wooden spoon until spreadable.
Spread the icing on top of the cooled cake.
Notes
The iced cake can be stored at room temperature in an airtight container for 2-3 days, unless you are living in an extremely humid place.