Preheat oven to 350F. Grease your cake pans and line the bottom with parchment paper. Set aside.
Place bananas, medjool dates, vanilla, cinnamon, salt, and water in a blender and blend into a smooth mixture. Add remaining ingredients and blend everything together, stopping periodically to scrape down the sides and help things mix together {see notes above if working without a high-power blender; use your tamper if using a Vitamix}.
Transfer the batter into prepared pans, level out the tops and press the mixture in using a spatula. Tap the pan on the counter a few times go get rid of any air bubbles. Bake in a pre-heated oven for 1 hour. Remove from oven and allow the cake to cool completely before frosting {see notes above for more details}.
When ready to frost, place bananas, medjool dates, vanilla, lemon juice, water, and sea salt into a blender and blend into a smooth consistency, add carob powder and sweet sticky rice flour and blend until mixture is uniform {just as you had done with the base layer}. Frost the cake {see notes above for tips}, decorate with toppings of your choice, and place in the fridge overnight for the cake to chill and fully set for best results. Enjoy!