Place crab, egg, bread crumbs, mayonnaise, Old Bay spice, lemon juice, onion powder and pepper in a large bowl.
Mix thoroughly.
Form mixture into 6 patties.
Heat butter in a skillet over medium to medium-high heat. Cook the patties until they are browned on each side, about 5 minutes per side.
Serve straight from the stove, or place on hamburger buns for crab cake sandwiches.
