Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to frost a cake [title] Let your cake cool. [step] The biggest mistake you can make when frosting your cake is using a hot cake and cold frosting. If your cake is even slightly warm, it will melt the icing which will then run over the edges and soak into the top layer, making it soggy.

Ending1: Cold icing makes the frosting too thin. [title] Roll the cake in some buttered, flour-free flour. Ending2: This can spread the frosting all over the surface of the cake, it's technically " icing the top ". To save on trouble, wait a few minutes after you've topped the cake with icing to keep it warm. Ending3: Further, if you use cold frosting it won't be smooth enough to spread and will bring up a lot of crumbs. [substeps] Always wait for both your cake and your frosting to reach room temperature. Ending4: To break away excess icing, take the top in your hands and let it cool completely. [substeps] You can put it on the table for you and your guests to enjoy.

Answer format: ending1/ending2/ending3/ending4