Every year when Passover comes around, I face the same dessert dilemma. The kids want chocolate cake, but most Passover cake recipes produce dense, heavy results that leave everyone disappointed. After years of tweaking and testing, I finally cracked the code for a chocolate sponge cake that's actually light and airy without using flour. This recipe relies on properly whipped eggs to create structure instead of gluten. The secret is separating your eggs and whipping the whites to soft peaks before folding them in gently. I use Dutch-process cocoa powder for the deepest chocolate flavor, plus a touch of potato starch to give the cake just enough body without weighing it down. The result tastes like a cross between chocolate mousse and traditional sponge cake. What really makes this cake special is how it improves after sitting overnight. The flavors meld together, and the texture becomes even more tender. I've served this to non-Passover guests who couldn't believe it was made without flour. The cake holds up beautifully to fresh berries or a simple dusting of powdered sugar. This works perfectly as a Passover dessert, but honestly, I make it year-round now because it's lighter than regular chocolate cake. It pairs wonderfully with fresh strawberries or a scoop of pareve vanilla ice cream. The whole thing comes together in about an hour, and you probably have most of the ingredients already.