Haluhalo (also called halo-halo, an ube shaved ice) and ube halaya (an ube jam that’s found in many ube desserts) are some of the most popular ube desserts, along with ube cake—made up of fluffy ube cake layers and frosted with ube buttercream. Ube extract: Ube extract provides the ube flavoring and coloring for the cake layers and buttercream. Ube jam: There’s a thick layer of ube jam filling in the cake for even more ube flavor. Use more or less ube extract: Ube extract has the greatest impact on flavoring the cake with the taste of ube. You can buy ube extract, ube jam and macapuno for this ube cake recipe at your local Filipino or Asian market.