Gather the ingredients.

Combine chicken, onion, parsley, egg, garlic, sea salt, and pepper in a bowl; mix well. Add mayonnaise and stir to combine; the mixture will be quite soft.

Place flour in a shallow bowl. Drop large spoonfuls of the chicken mixture into the flour. Roll to coat and press gently into patties.

Heat oil in a skillet over medium-high heat. Cook chicken patties in the hot oil until golden brown and no longer pink in the center, 5 to 7 minutes per side.