Ingredients
Buttercream
Method
1.Preheat oven to moderate, 180°C. Lightly grease and line a 20cm round cake pan with baking paper.
2.In a large bowl, using an electric mixer, beat butter and sugar together until pale and creamy. Add eggs, one at a time, beating well after each addition.
3.Lightly fold flour into creamed mixture alternately with milk, beginning and ending with flour. Divide mixture into three separate bowls.
4.Mix combined cocoa and extra milk into one bowl. Fold food colouring into second bowl. Leave third bowl plain.
5.Drop alternate colours into pan until two-thirds full. Swirl gently with a flat-bladed knife or skewer.
6.Bake 40-45 minutes, until cooked when tested. Cool in pan 5 minutes. Turn onto a wire rack to cool completely.
7.To make buttercream, in a small bowl, using an electric mixer, beat butter and icing sugar together until pale and fluffy. Gradually beat in milk, colouring and essence.
8.Spread over cooled cake.