Melt the butter in a large saute pan over medium heat. Add the bread crumbs, salt, crab boil seasoning, and pepper and stir with a wooden spoon until the butter is fully incorporated. Remove from the heat and allow to cool.
Put the crabmeat in a large bowl, and pick through to remove all the shells. Add the lemon juice and toss. Mix in the sour cream, egg, flour, parsley, mustard, and prepared bread crumb mixture. Season with salt and pepper, to taste. Form the crab mixture into 6 patties, approximately 2 1/4-ounces each. Coat each patty in flour and shake off excess.
Heat the oil in a large saute pan over medium heat. Add the crab cakes and cook until evenly browned, about 2 minutes on each side. Transfer to a serving platter and serve with the Oyster House Cocktail sauce on the side.
Mix all the ingredients together and store in an airtight container until ready to use.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.