Arrange them in the Air Fryer basket in a single layer, leaving space between them. Air fry them for 5-8 minutes or until they start to shrink and appear dry.
Let them cool down completely, then transfer them to a food processor or a spice grinder and grind them until you get a coarse mixture like this.
Transfer this back to the Air Fryer basket and cook again for a few minutes until all the moisture disappears.
Allow this to cool down completely and crush it further using a rolling pin if you notice some clumps.
Use immediately or store for later.
Notes
I've air fried the dates twice- once before processing and once after, just to get them as dry as I can. You can choose to process them only once, if that's what you prefer.
Keep an eye on the dates at the 6 minute mark. If the dates look dried and ready, get them out quickly. Keeping them in too long can cause them to burn.
Depending on your personal preference, you can process the dates into a fine ground consistency or keep them a little coarse- like I did!
Make sure you allow the dates to cool down completely before you grind them, or they can clump together. To do this quickly, you can pop the air fried dates into the freezer for a few minutes.