In a mixing bowl, mash 1 cup of very ripe bananas until smooth. Stir in 3/4 cup of self-rising flour and 1/2 teaspoon of cinnamon until a thick, cohesive dough forms. Gently knead the dough for 8–10 turns, then roll it into 20–24 small balls.

Preheat your air fryer to 350°F (175°C) for 2–3 minutes. Lightly grease the air fryer basket with coconut oil.

Carefully arrange the dough balls in the basket of your air fryer, ensuring space between each for proper air circulation. Air fry at 350°F (175°C) for 6–7 minutes, shaking the basket halfway through.

While the donut holes are still warm, brush them with melted coconut oil. In a bowl, mix 1/4 cup of sugar with 1 teaspoon of cinnamon. Roll each donut hole in the cinnamon-sugar mixture.

Serve your homemade vegan air-fried banana donut holes immediately for the best taste and texture.