Makes one 6" cake.
A note about substitutions: You might try replacing the vanilla rice protein with another vegan protein, like pea protein. Otherwise you might replace the whey, rice, and coconut flour with its total volume of Warrior Blend vanilla protein powder, which bakes up very well. You could also replace the Chardonnay grape juice with store-bought white grape juice.
Almond meal can be made by pulsing almonds in a food processor. Sift out the large pieces and pulse again. Be careful not to overprocess, as this will give you almond butter.