Slice the cake when serving. Best eaten warm. If you have leftovers which is seldom, you can add the slices in a plastic bag and leave it in the refrigerator. To warm up the cake you can use a microwave. Although this recipe seems simple, it might take several times for you to get the perfect cake. If after the eggs are beaten and somehow the mixture became flat, the roti kukus a will not rise and that is frustrating. I assure you that if you try it again you'll get the hang of it! Good luck.