Recipe : Lamingtons Cake

This is a free recipe : Lamingtons Cake, which I got from buying one of Lamington Baking tray :

Cake Mix Ingredients :
125g butter
2/3 cup sugar
2 eggs
2 cups self-raising flour
1/2 teaspoon salt
1/3 milk (approx)
1/2 teaspoon vanilla essence

Chocolate Icing Ingredients :
30g butter
1/2 cup boiling water (approx.)
3 cups icing sugar
1/3 cup cocoa
1/2 teaspoon vanilla essence
2 cups dessicated coconut

Cake Mix Method :
1. Cream butter and sugar until light and fluffy
2. Add eggs one at a time, beating well after each addition
3. Sift flour and salt
4. Add alternatively with milk to mixture
5. Add vanilla essence
6. Blend well, but do not over beat
7. Add a little more milk if necessary, to form a soft dropping consistency
8. Spread evenly onto tray
9. Bake in a moderate oven (180deg C/350 deg F) for 25-35 minutes, or until cooked
10. Turn out and cooled on a cake rack
11. Cut into 30 squares
12. Dip each square into chocolate icing and roll in coconut

Chocolate Icing Method :
1. Melt butter in 1/4 cup boiling water
2. Sift icing sugar with cocoa
3. Add liquid, mixing well
4. Add vanilla essence
5. The icing must be thin so that squares of cake can be readily coated
6. Add sufficient boiling water to form this consistency