To make the burned/browned butter put the butter into a saucepan and slowly let it melt until the butter starts to become brown. Careful as it can go really quick at the end. Once it starts to smell amazing you know you're good to go. Turn of the heat and let it cool down a bit.
Preheat your oven to 180 C.
Combine all the dry ingredients into one bowl (flours, sugar, baking powder, cinnamon, salt) and mix well to combine.
Mix your wet ingredients in another bowl (buttermilk, egg, vanilla essence). Mash your bananas and add them to the wet ingredients. Stir well to mix.
Combine your wet and dry ingredients and stir with a wooden spoon into well combined. Don't overbeat at this point.
Once all mixed ad your melted butter in and also stir in the pecannuts and chocolate chunks. Again, stir to just combine.
I used a bundt cake form but the batter was just a tiny bit too much for my form. Ofcourse you can use any other tin you want. Just make sure you adjust the baking times where needed.
Bake in the preheated oven for about 50-60 min or until a wooden skewer comes out fairly clean. Don't let it get too dry.