Air Fryer Beignets
Ingredients:
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cooking spray
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½ cup all-purpose flour
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¼ cup white sugar
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⅛ cup water
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1 large egg, separated
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1 ½ teaspoons melted butter
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½ teaspoon baking powder
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½ teaspoon vanilla extract
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1 pinch salt
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2 tablespoons confectioners' sugar, or to taste