INGREDIENTS
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Nonstick vegetable oil spray
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1 cup whole wheat flour
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1/2 cup buckwheat flour or whole wheat flour
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2 teaspoons ground cinnamon
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1 teaspoon kosher salt
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1 teaspoon baking soda
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1/2 teaspoon baking powder
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4 very ripe bananas
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2/3 cup (packed) dark brown sugar
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2 large eggs, beaten to blend
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1/2 cup olive oil
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1/2 cup sour cream
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4 ounces cream cheese, room temperature
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1/2 cup plain Greek yogurt
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Pinch of kosher salt
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1/3 cup powdered sugar
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1/2 teaspoon espresso powder