- Whisk the egg, mayonnaise, mustard, Worcestershire, Old Bay, parsley and lemon juice in a large bowl.
- Add the crab and cracker crumbs. Fold gently with a spatula so the lumps stay whole.
- Shape into 6 cakes about 1 inch thick. Set on a plate, cover and chill for 30 minutes so they hold together.
- Heat the butter and oil in a large skillet over medium-high heat. Cook the cakes until deep golden, 3 to 4 minutes per side.
- Serve with lemon wedges and tartar sauce.