Prepare Sweet Potato: Roast or steam the sweet potato until soft, then scoop the flesh into a bowl.
Add Ingredients: Add the banana, eggs, and cocoa powder to the bowl.
Mash: Use a fork to mash everything together until a thick, smooth batter forms.
Add Chocolate: Stir in dark chocolate chips.
Pour Batter: Transfer the batter into a parchment-lined baking dish and spread evenly.
Bake: Bake at 180°C / 350°F for 20–25 minutes until set on the edges.
Cool: Allow the brownies to cool before slicing so they firm up properly.
