You can make this cake in different shaped molds, but the baking time will be different. If using smaller molds, bake for less time; if using a larger mold, bake for more time.   You can use a regular blender if you don’t have a hand blender, or if you don’t have either at hand you can use a whisk. If you use a whisk, you will have a lot more air bubbles to tap out of mixture.   You can also use one nine-inch cake pan instead of the silicone molds. Once the cake has been left in the freezer to harden, get some parchment paper and lay it on a flat surface. Pull out cake and run some heat below the surface, on the stove top or with a blowtorch; get it warmed up, less than 30 seconds, just enough heat to be able to slam the cake down on the surface and have it pop right out. If it doesn’t release when slam down, apply a bit more heat – but not too much that the cake starts to melt. Cut to desired size.