INGREDIENTS
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3/4 cup butter, room temperature
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3/4 cup light brown sugar
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1 egg
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1 teaspoon vanilla
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2 medium ripe bananas, mashed
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1/2 teaspoon baking soda
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1/2 teaspoon kosher salt
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2 cups all purpose flour
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1/4 cup butter
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1/2 cup dark brown sugar
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1/3 cup heavy cream
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1/2 teaspoon kosher salt
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2 cups powdered sugar