Notes from recipe:
Mango: I have tested this cake with frozen pineapple and it is also delicious! Because pineapple is sweeter, use a scant 1/2 cup measure of maple syrup.
Coconut Butter Substitution: If you don't want to use coconut butter, substitute raw cashew butter. It is thick and has a pale color, so works quite well. You won't need as much milk to thin, since it isn't as dry as coconut butter. Start with 1 tbsp milk, then adjust as needed.