Air-Fried Cinnamon and Sugar Doughnuts

By MumAndMe

2.68 / 5

25min

16min

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½ cup white sugar
2 ½ tablespoons butter at room temperature
2 large egg yolks
2 ¼ cups all-purpose flour
1 ½ teaspoons baking powder
1 teaspoon salt
½ cup sour cream
⅓ cup white sugar
1 teaspoon cinnamon
2 tablespoons butter melted, or as needed