INGREDIENTS
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2 tablespoons unsalted butter
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¼ cup Nutella
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1 large egg
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2 tablespoons milk
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1 teaspoon pure vanilla extract
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3 tablespoons granulated sugar
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6 tablespoons (¼ cup plus 2 tablespoons) self-rising flour
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Pinch of kosher salt
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¼ cup chopped hazelnuts preferably toasted (optional)