INGREDIENTS
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2 tablespoons unsalted butter, divided
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1/4 cup packed dark brown sugar
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1/8 teaspoon ground cinnamon
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1 strip lemon zest (1 inch long by about 1/2 inch wide)
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1 large, firm, ripe bananas, peeled and halved lengthwise and then halved crosswise
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2 cupsunbleached all-purpose flour
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1 tablespoon baking powder
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1/2 teaspoon salt
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1/2 teaspoon ground cinnamon
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5 tablespoons cold unsalted butter, cut into 1/4-inch cubes
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1 cup heavy cream
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1 cup plus 3 tablespoons powdered sugar
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2 tablespoons dark rum