Air Fryer Beignets

Ingredients

• cooking spray
• 1/2 cup all-purpose flour
• 1/4 cup white sugar
• 1/8 cup water
• 1 large egg, separated
• 1 1/2 teaspoons melted butter
• 1/2 teaspoon baking powder
• 1/2 teaspoon vanilla extract
• 1 pinch salt
• 2 tablespoons confectioners’ sugar, or to taste