Use good quality chocolate: The brand and quality of chocolate largely determines the outcome of the recipe. I used Ghirardelli and it came out really good.
Making the banana rectangle: You don't have to arrange the banana rectangular shape perfectly. As long as all the slices are touching, it's fine.
Keep the bark chilled: The bananas get dark and mushy if the bark is left out of the refrigerator for too long, so keep it refrigerated or frozen.
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