Peel the bananas and cut into pieces. Pour into a mixing bowl. Add the vanilla ice cream (you may need to save a scoop for the later garnish) and the washed mint leaves. Top up with the milk. Now puree everything with a hand blender. Finally add the pinch of chilli and the brittle and mix again briefly.
Pour this mixture into two large coffee mugs (approx. Up to halfway) and fill up with the cold coffee (if you have saved a ball of ice, add it to the ice coffee). Because only sprinkle the iced coffee with a pinch of cinnamon.