Ingredients
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3 ½ cups all-purpose flour
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2 teaspoons baking soda
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1 teaspoon salt
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½ cup butter at room temperature
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½ cup vegetable shortening
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2 cups white sugar
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½ cup brown sugar
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4 ripe bananas
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4 eggs
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1 cup buttermilk
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½ cup sour cream
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2 ½ teaspoons vanilla extract
Directions
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Preheat oven to 350 degrees F (175 degrees C). Grease 2 9x5-inch loaf pans. In a bowl, whisk together the flour, baking soda, and salt.
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In a separate large bowl, beat the butter, vegetable shortening, white sugar, and brown sugar together with an electric mixer on Low until thoroughly mixed; beat in the bananas, eggs, buttermilk, sour cream, and vanilla extract until well combined. Mix half of the flour mixture into the banana mixture; beat until combined; beat in remaining flour mixture. Mix on Medium speed for 1 minute. Pour the batter into the prepared loaf pans.
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Bake in the preheated oven until a toothpick inserted into the center of the loaves comes out clean, 50 minutes to 1 hour. Allow to cool for 15 minutes; serve warm.
