Chop nuts e.g. in Thermomix® blender speed 4.5 for 4 sec and set aside in bowl

Peel, add and process 3-4 bananas speed 4 for 2 sec

Add sugar and oil, mix speed 3-4 for 5 sec

Add flour, baking powder and cinnamon. Combine well at speed 4 for 10 sec

I filled 24 silicon muffin forms with this amount of dough

Sprinkle top of muffins with the left-over chopped walnuts and if you'd like a tiny amount of brown sugar

Bake at 200℃ middle rack for 20 minutes. May vary +/- 1-5 min depending on your oven, but don't let them get too dark on top or to dry.

BBC's original recipe recommends: add to greased and lined 2lb loaf tin. I am using a Christmas tree silicone shape for half the dough.

In my tree shape I only baked it for 20 minutes all together.