Gluten Free adaptions: Substitute an all purpose gluten free flour blend, like [easyazon_link identifier="B0096MPAWQ" locale="US" tag="mamago-20"]Cup 4 Cup gluten free flour[/easyazon_link]for the cake flour. The cake layers may have to bake a few minutes longer, watch carefully.
Make ahead instructions:
You can make the cake layers ahead, cool completely, wrap tightly and freeze until you are ready to assemble the cake.
The banana curd will stay for a couple weeks in the fridge, stored in an airtight container. If you have any leftovers it's great on pancakes, toast, oatmeal, or yogurt.
The whipped cream frosting is very stable and can be stored covered in the fridge for a couple days in an airtight container.
You can make this using three 9 inch cake pans, but cake layers will be a little thinner and you will have to reduce baking time.