Ingredients
Method
- Stir together the mayonnaise, sour cream, horseradish, ketchup, 1/4 tsp cayenne, and 1/4 tsp garlic powder in a small bowl. Cover and refrigerate.
- Peel the onion, slice into wedges, and separate into individual petals about 1/2 inch wide at the outer edge, discarding very thin center pieces.
- Whisk the flour, paprika, 1 tsp garlic powder, onion powder, 1/2 tsp cayenne, salt, and black pepper together in a wide shallow bowl. Beat the eggs and milk together in a separate bowl.
- Coat each petal in the seasoned flour, dip in the egg wash, then coat in the flour a second time, pressing lightly. Rest on a rack for 5 minutes.
- Heat the vegetable oil in a heavy pot to 375°F (190°C). Fry the petals in batches of 5 to 6, turning once, for 3 to 4 minutes until deep golden-brown. Transfer to a wire rack.
- Pile the petals on a serving plate, place the dipping sauce in a ramekin alongside, and sprinkle with a pinch of paprika before serving.
Notes
The sauce can be made up to 24 hours ahead and kept covered in the fridge. If you're scaling this up for a crowd, mix a larger batch of the seasoned flour first so you don't run short mid-dredge. A thermometer for the oil isn't strictly required, but it makes a real difference in consistency across batches.
