Pre heat your oven to 180c (360f).
Line your baking dish/pan with greased foil (or parchment paper)
Add melted butter to a large mixing bowl.
Sift cocoa powder in to the butter whilst mixing.
Once butter and cocoa are combined, aadd the sugar, salt and vanilla extract.
Mix until fully combined and smooth.
Add the eggs and the honey to the mixture, and keep mixing until fully combined.
Mash two of your bananas, but you want them to be a little lumpy to add texture to the brownies. Add these to the mixture and combine.
Sift the plain flour in to the mixture. Carefully fold this in, making sure the mixture is completely smooth.
Pour mixture into your lined baking pan or dish, and flatten out the top with the back of a large spoon.
Cut your third banana in lengthways in to three strips, and gently lay on top of the brownie mixture. Push them in a little.
Bake for 45 minutes, and then allow 10 minutes to cool.