INGREDIENTS
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3 ripe bananas, mashed
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1/2 cup granulated sugar
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1/2 cup light brown sugar, lightly packed
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1/2 cup vegetable oil
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2 large eggs, room temperature
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1/2 cup sour cream (or buttermilk)
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1 teaspoon pure vanilla extract
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2 cups all-purpose flour
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1 tsp baking soda
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1/2 tsp salt
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1 cup toasted hazelnuts (measure before grinding) finely ground
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for the Nutella Buttercream
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4 Tbsp unsalted butter, at room temperature
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1 13-oz jar of Nutella
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1 cup sifted confectioner's sugar
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4 to 6 Tbsp heavy cream (or milk)