11. Trim onion ends and carefully slice from top, leaving root intact. Make 16 evenly spaced cuts from top, rotating 1/4 turn between cuts to create "petals".
22. Whisk flour, paprika, garlic powder, salt, and pepper in large mixing bowl.
33. Beat eggs and milk together in separate bowl until fully combined.
44. Gently separate onion petals, creating classic "blooming" shape.
55. Dredge entire onion in seasoned flour mixture, then dip completely in egg wash. Repeat flour coating for extra crispiness.
66. Heat vegetable oil to 375°F in heavy-bottomed Dutch oven.
77. Carefully lower entire onion into hot oil, petal-side down. Fry until golden brown and crispy, about 3-4 minutes per side.
88. Remove and drain on wire rack lined with paper towels.
99. Whisk sauce ingredients until smooth and creamy.