To a large bow, add instant coffee granules and hot water. Mix until coffee dissolves completely.
To same bowl, add sugar and water. Mix until sugar dissolved completely.
Add oil and mix well.
The, sift in flour and baking powder. Mix until flour is no longer visible. Do not overmix.
Oil silicone molds.Then, spoon batter into mold. Preheat Air Fryer at 350oF (180oC) for 2 min.Then, air fry cakes at 350oF (180oC) for 2 min.Then, lower to 325oF (160oC) for 8 min. Please adjust cooking time according to your air fryer. All air fryers are not the same. Unmold and let the cake cool down completely on a wire rack before glazing.