Salted Macadamia Banana Cake

1 egg
1 ripe banana mashed
1/3 Cup Forty Thieves Salted Macadamia butter
1/4 Cup maple syrup
2 Tbsp melted ghee/coconut oil
1/2 Cup almond flour
1/4 Cup coconut flour (sifted if necessary)
1 tsp baking powder
1/2 tsp vanilla extract
mini dark chocolate chips

Icing:

1 Cup Greek yoghurt
2 tbsp Forty Thieves Salted macadamia butter
1 tbsp maple syrup