Prepare the mushroom by gently tearing fronds into bite-size pieces from edge of cap to stem, making sure to keep pieces connected to base.
Whisk milk and egg in large mixing bowl.
Whisk flour, salt, pepper, cayenne powder, onion powder, garlic powder and cumin in separate large mixing bowl.
Coat mushroom in liquid mixture then dredge in flour. Repeat this process one more time then place mushroom in refrigerator.
Pour enough oil to submerge mushroom in large vessel and heat to 350°F.
Once oil is up to temperature, remove mushroom from refrigerator and slowly lower into cooking vessel gill-sides down. Use metal utensil to ensure it is fully submerged and cook until golden brown (about 10 minutes). Remove and place on drying rack.
Place mushroom on serving plate and cut center in “X” pattern to make room for dipping sauce. If mushroom cluster doesn’t stand on its own, wrap the base of it in a rolled piece of aluminum foil to help it stand up.
Place sauce in center, garnish with some more scallion greens and serve.