In a bowl, combine flour, baking powder, sugar, cinnamon, and salt.

In another bowl, mix melted butter with warm water; gradually add this mixture to dry ingredients until a smooth dough forms.

Roll the dough into bite-sized balls (about 1 inch in diameter).

Preheat your air fryer to 375°F (190°C) for 5 minutes.

Place churro balls in the air fryer basket without overcrowding and cook for about 8 minutes or until golden brown.

Toss warm churro bites in a mixture of sugar and cinnamon before serving.