Mix together sour cream, lemon juice, onion, Worcestershire, dry mustard, garlic powder, and cream cheese.
I use a hand mixer to get it blended really well.
Fold in cheddar cheese and crabmeat.
Spoon mixture into casserole dish and sprinkle with paprika or Old Bay Seasoning.
Bake at 325°F for 30 minutes, or until heated through.
Serve with tortilla chips, crackers, toast points, or my Maryland family's favorite-- Bugles!