Mix the flour, garlic and onion powders, paprika and salt in a large bowl. Whisk in the water and mix until smooth.
Pour the cauliflower into the batter and stir to coat each piece.
Take out the pieces of cauliflower and set them on a rack to let the excess batter drip off.
Place a piece of parchment paper on the bottom of the air fryer basket, or spray it with cooking spray.
Arrange the cauliflower pieces inside the basket in a single layer, not touching each other. Air fry at 350º F (175º C) for 15 minutes. They don’t need to be flipped halfway through.
When done, toss the cauliflower pieces in a bowl with the buffalo sauce until coated. Serve with blue cheese dressing and blue cheese crumbles if desired.
Notes
To bake them in the oven place them on a lined baking sheet, not touching, and bake at 400º F(200ºC) for 20 minutes or until golden brown.