You will need: 125g cake flour (or plain flour), 1/4 teaspoon salt, 10g cocoa, 57g butter (at room temperature, 150g white sugar, 1 egg, 1/2 teaspoon vanilla extract, 1/2 cup buttermilk, 1 tablespoon liquid red food colouring, 1/2 teaspoon white vinegar, 1/2 teaspoon baking soda
First sift flour, salt and cocoa powder into a large bowl.
Beat butter until soft with an electric mixer. Then add the sugar and beat until light and fluffy.
Add the egg and beat until combined.
Combine the red food colouring and the butter milk.
Wow, very red! It's a good idea to do this in a measuring jug with a spout, so you can pour it in easily.
Alternately add the flour mixture and the buttermilk mixture, beating on low speed. Start and end with the flour mixture.
Meanwhile, for the cream cheese icing you will need: 113 g cream cheese, 1/4 teaspoon vanilla extract, 30g icing sugar, 80ml of whipping cream.
Beat the cream cheese until smooth. Add the vanilla extract and icing sugar and beat until combined.
Gradually add the cream and whip until the icing is thick enough to pipe. I accidentally bought light cream so it didn't get as thick as it should have but it still held its shape.