(slighly adapted from: here)
225g ripe bananas (peeled)
225g brown sugar
150g melted butter (room temperature)
60g walnut oil (I used sunflower oil)
1 teaspoon baking powder
1 pinch of salt
grated zest of 1 lemon
1 vanilla pod (scraped out seeds)
some butter for the pan
For the spice mixture:
4g star anise (whole)
4g cinnamon stick
1g cloves (whole)
2g black pepper (whole)
1g cardamom (whole)
For the spice mixture, roast all the spices seperately in a large frying pan without oil. Then, put in a mortar and grind until you got powder and mix together.
For your cake, line a 20cm square cake tin or a 24cm diameter springform pan with parchment paper and grease with butter. Preheat the oven to 180°C.
Put sugar, eggs and the mashed bananas into a large bowl and mix with your electric hand mixer until well combined. Add the vanilla seeds and the lemon zest and mix well. Add oil and butter and combine. Then, sift in flour and baking powder. I took two teaspoons of the spice mixture and also sifted it in. Add the salt. Mix until you have a smooth dough.
Pour your batter into the prepared cake tin and bake for about 35 minutes (my cake took about 45 minutes). As usual, check with a wooden skewer whether the cake is done. If the inserted skewer comes out of the cake clean, it's done.
Sift together some of your leftover spice mixture and some sugar and sprinkle over your cake.