01 -
Clean mushrooms by wiping with a damp paper towel or lightly rinsing and patting dry. Trim stems if needed, keep whole.
02 -
In a large bowl, mix buttermilk, garlic powder, paprika, salt, and black pepper. Add mushrooms, coat fully. Cover and soak for 30 minutes.
03 -
In one shallow bowl, mix flour and cornstarch. In another bowl, mix breadcrumbs, salt, black pepper, and cayenne (if using).
04 -
Remove mushrooms, shake off excess liquid. Dredge in flour mixture, dip back in buttermilk, then coat in breadcrumb mixture. Let sit 5 minutes.
05 -
Heat oil to 350°F (175°C). Fry in batches, 3-4 minutes until golden brown. Drain on paper towels. Sprinkle with salt while hot.
06 -
In a small bowl, whisk mayo, sour cream, lemon juice, dill, garlic powder, onion powder, salt, and pepper. Stir in parsley or chives. Chill 15 minutes.