Cut off 1/2 inch from top of onion. Peel off outer layer of onion. Place cut side down on cutting board with root side facing up. Start 1/2 inch from top of onion, cut through onion. Turn onion halfway and cut 1/2 inch from top through onion. Cut 2 more times between the cut sides. Cut through 4 more times. Keep rotating onion and making slits until you have 16 attached wedges.Turn onion over and let sit for 5 minutes to allow petals to open up.
In a pie plate or medium bowl whisk together flour, 1/4 tsp each of salt, pepper, garlic powder, paprika, and 1/8 tsp ceyenne.
In a separate pie plate or medium bowl whisk together eggs, milk, water, and 1/4 tsp each of salt, pepper, garlic powder, paprika, and 1/8 tsp ceyenne.
Place onion carefully into seasoned flour and dredge onion entirely making sure to get all in between the onion petals. Shake off excess.
Place flour dredged onion into egg mixture and using a spoon coat onion thoroughly.
Place onion back into flour mixture and dredge once more. Place onion onto a piece of foil and fold foil like a bowl around onion carefully, not to touch sides of onion.Spray top of onion petals with a non-stick avocado oil. Place onion into air fryer basket and set into air fryer. Bake for 20-25 minutes on 360 degrees.NOTE: every 5 minutes or so, pull basket out and spray onion petals and continue cooking until onion is golden brown.
In a medium bowl whisk together all ingredients for the dipping sauce. Serve with blooming onion and enjoy.