These are some of the best cakes you’ve probably never heard of. First, it’s Hot Milk Sponge Cake, which offers a science lesson on scalded milk. Then, we make Broken Phyllo Baklava Cake, which uses broken pieces of phyllo instead of flour. Finally, it’s Invisible Apple Cake (Gâteau Invisible), where thin slices of apple disappear into an egg-rich batter.