Marbled Chocolate Banana Bread

Ingredients

3 large or 4 small overripe bananas

1 stick unsalted butter, melted

145g brown sugar

1 egg

1tsp vanilla extract

1tsp baking soda

1/4tsp fine salt

130g + 35g ATK flour 

20g cocoa powder

130g chocolate chips or chunks

Directions

Preheat oven to 325 degrees.

In the largest glass bowl, melt butter in the microwave, covered by a plate (90 seconds on 50% power). Mash bananas into melted butter. Whisk in brown sugar, egg, and vanilla. Whisk in baking soda and salt. Stir in 130g flour.

Pour half of the mixture into the next-smallest glass bowl (eyeball it or measure out 365g of batter). Mix the additional 35g flour into one half and the 20g cocoa and chocolate pieces into the other. 

Line a loaf pan with a strip of parchment paper. Dollop 1/3 of chocolate mixture into each end, then 1/3 of plain mixture in the middle. For the second layer, dollop the remaining 1/3 chocolate mixture in the middle and the last two 1/3s of plain on either end. Swipe the offset spatula around in a figure 8 a few times to marble but not fully mix. Bake for 1 hour.