Here is another recipe from my old (1968) cookbook assembled by a group of volunteer ladies in Rocky Ridge Maryland.

Hot Crab Dip Casserole

1. 1/2 pt. sour cream (I used Daisey Lite)
2. 2 8 oz. packages cream cheese (Again, I use the lite)
3. 1 Tsp. mustard
4. A shake of Worcestershire sauce
5. A shake of garlic powder (Not garlic salt)
6. A shake of Old Bay seasoning
7. 4 Tbspns mayo( I like Dukes)
8. 1/2 cup grated (finely) sharp Cheddar cheese
9. A little milk to thin if needed.

Beat all ingredients together and top with cheese. Bake at 300 for one hour. Serve with a heavy cracker like Ritz or with toast.