INGREDIENTS
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⅔ cup unsalted butter, softened
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1 cup granulated sugar
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½ cup dark brown sugar, firmly packed
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3 large eggs, room temperature
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1 cup ripe mashed bananas (about 2 large bananas)
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1 teaspoon vanilla extract
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3 cups all-purpose flour
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1½ teaspoons baking soda
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¼ teaspoon kosher salt
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1½ cups whole buttermilk, room temperature
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½ cup unsalted butter, softened
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1 (16-ounce) package confectioners' sugar
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2 to 4 tablespoons whole buttermilk
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1 teaspoon vanilla extract
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½ teaspoon kosher salt
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sliced bananas for garnish, optional
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chopped salted cashews for garnish, optional