In a large mixing bowl, stir the flour, cocoa powder, sugar, and baking powder together.
1 cup all-purpose flour, ⅔ cup unsweetened cocoa powder, ½ cup granulated sugar, 1 teaspoon baking powder
Add the vanilla extract, salted butter, and ⅔ cup heavy whipping cream. Whisk until the batter is smooth.
1 teaspoon pure vanilla extract, 4 tablespoons salted butter, 1 cup heavy whipping cream
Fold in the chocolate chips.
¼ cup chocolate chips
Pour the batter to a silicone mold, filling up ¾ of the way. Place into the air fryer and set to 350°F. Cook for 10 minutes.
While the donut holes are cooking, prepare the glaze. Add the powdered sugar and 4 tablespoons heavy whipping cream to a small bowl and whisk to combine.
½ cup powdered sugar
Let the donuts cool on a wire rack for 5 minutes. Remove donut holes from the mold, toss in the glaze, and place on a wire cooling rack to allow excess glaze to drip off. Let set for 5 minutes and serve.