If you're worried about using alcohol in a cake that might - but doesn't have to - be destined for children, then just use two spoonfuls of the (usually apple) juice the pineapple was canned in. It also makes it less expensive to make if you don't keep Malibu in the house; frankly, though, I am never without it. But if I were you, I certainly wouldn't dream of going out and buying it especially.
This is a wonderful cake: amusing but no joke; the velvety sponge is dark, moist and gently fragranced. Go easy on the essence in the icing, though, or it will be just too Hawaiian Tropic.
Recipe posted by Nigella