125g butter beat till white Then add 1 cup castor sugar and beat till light and fluffy. Then add in 3 eggs 1 @ a time beating after each addition. Sift together 1 & ¾ cup cake flour, ¼ cup cocoa, ¼ cup corn flour & 2 & ½ teaspoons baking powder. Add to mixture with ¾ cup milk. Mix till smooth.