Chocolate swirl banana bread

Start by preheating your oven to 350F. In a large bowl or stand mixer add your bananas and mash until smooth. Once mashed add your sugar and butter and mix. Add your egg and vanilla extract and mix until smooth. Once all your wet ingredients are incorporated add your dry ingredients (besides cocoa powder) and chocolate chips and fold to combine. Separate your batter into two equal portions. Add cocoa powder to one bowl and mix to combine. Line an 8x8 baking dish and add your chocolate batter and plain batter mixing in between. Once all your batter is added top with additional chocolate chips and bake on 350F for 50-55 minutes. Allow your banana bread to cool for 20 minutes before slicing and enjoying!