Grease the mini Bundt pan and place it in the oven to heat up as the oven is pre-heating.
Cream the coconut oil and brown sugar together with a hand held electric mixer.
Add in the egg and beat well.
Then add in the bananas, yogurt, vanilla and beat till well incorporated.
Sift the buckwheat flour and add that to the mix, along with the baking powder, baking soda, cinnamon, cardamom and salt.
Remove the mini Bundt pan from the oven.
Pour/spoon mix into the mini Bundt pan and return to the oven.
Let bake for 22-25 minutes.
Let cool and sprinkle with powdered sugar when completely cool or mix together powdered sugar and milk till they reach an icing consistency, add in a couple pinches of cardamom and cinnamon (like I did with these) and pour over mini Bundts.