01 -
Combine cold mashed potatoes, parmesan, onion, parsley, garlic, salt, pepper, and 1 egg in a large bowl. Stir until evenly mixed.
02 -
Scoop tablespoon-sized portions and roll into 2-inch logs or balls. Place shaped croquettes on a plate.
03 -
Refrigerate shaped croquettes for at least 30 minutes until firm. This prevents them from falling apart during frying.
04 -
Arrange three shallow bowls: one with flour, one with the remaining 2 eggs whisked, and one with panko.
05 -
Roll in flour first, then dip in egg, then coat in panko. Use one hand for wet and one for dry to keep the process neat.
06 -
Heat 2 inches of oil to 350°F in a high-sided skillet. Fry a few croquettes at a time for 2-3 minutes, turning gently, until deeply golden. Let oil return to temperature between batches.
07 -
Transfer finished croquettes to a wire rack or paper towel-lined plate. Serve hot while the crust is crunchiest.