Chocolate with orange cake

Beat with butter and sugar cream. Mix with egg, flour, milk and orange peel. Heat butter in a well-greased loaf tin (180 সেন C / 350 ফার F). Bake until the knife is easily inserted. When it is done, cool the war radka. To make the icing, pour the icing sugar and put it in a heatproof bowl with cocoa. Place the bowl with butter on a pot filled with boiling water. Shake with plenty of water to make a spreadable thing. Spread icing sugar on top and side of the cake.