Start by mashing the overripe bananas in a bowl until smooth.
In a separate bowl, mix together the cocoa powder, sea salt, and baking powder.
In another bowl, whisk the egg and then add the melted butter and brown sugar, mixing until well combined.
Gradually incorporate the dry ingredients into the wet mixture, stirring until just combined.
Fold in the mashed bananas, chopped dark chocolate, and nuts.
Pour the batter into a prepared baking dish and drizzle honey on top.
Sprinkle black sesame seeds and flaky sea salt over the batter.
Bake in a preheated oven until a toothpick inserted in the center comes out clean.
