Preheat the oven to 350 degrees and prepare the two 8-inch pans by lining the bottom with parchment paper and spraying with non stick spray.
Make the oat flour by blending rolled oats in a high speed blender until the consistancy of flour.
In a large bowl, mix the whole wheat pastry flour, oat flour, almond flour, coconut sugar or stevia, salt, cocoa powder, and baking soda.
Heat the almond butter until it is pourable and add to the dry ingredients, along with the pureed banana, vanilla, and warm water.
Add the coffee, along with the apple cider vinegar. Stir well and watch the mixture foam.
Pour the batter into the pans and bake at 350 degrees for about 25 minutes or until a toothpick inserted in the center comes out clean.
Remove from the oven and let cool for at least 10 minutes in the pan. Then, turn out onto a plate and let cool completely before frosting.