01 - In a medium bowl, whisk together the mayonnaise, sour cream, buttermilk, dill, chives, parsley, garlic powder, onion powder, salt, black pepper, and lemon juice. Cover and refrigerate until serving.
02 - Arrange three shallow bowls: place flour in the first, whisk eggs and buttermilk in the second, and combine panko breadcrumbs with paprika, garlic powder, cayenne (if using), salt, and black pepper in the third.
03 - Working in batches, dredge each pickle slice in flour, dip into the egg-buttermilk mixture, then coat thoroughly with the seasoned panko breadcrumbs.
04 - Pour 2 inches of vegetable oil into a deep skillet or Dutch oven and heat to 350°F.
05 - Fry pickles in batches for 2–3 minutes per side until golden brown and crisp. Avoid overcrowding the pan to maintain proper oil temperature.
06 - Remove fried pickles with a slotted spoon and drain on paper towels. Serve immediately with the chilled ranch dip.