Preheat oven to 350F Spray a 9x5 loaf pan with cooking spray or lightly butter. I like to line it with parchment paper with long ends so I can lift it out for easy slicing.
Whisk the dry ingredients together in a bowl and set aside.
Cream the butter and sugar for about 4 minutes until light and fluffy. Scrape down the sides of the bowl a few times to get all the sugar and butter incorporated.
Beat in the eggs, one at a time. Then blend in the mashed bananas, sour cream, and vanilla. Keep scraping down those sides! (The mixture may look curdled at this stage, but don't worry, it's fine.)
Fold in the dry ingredients until just barely incorporated, and then fold in the chocolate chips, blending until everything is just mixed and there's no dry flour left...don't over beat.
Spoon batter into your pan and even out. Slice the banana into 3 slices, lengthwise, and arrange on the top. Sprinkle with sugar and bake for about 65-75 minutes, or until a toothpick comes out without wet batter on it.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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