You can use shrimp in place of crab if you want or just add it with it I also add cream of mushroom soup to mine.
Melt butter, add flour and blend thoroughly. Add onions and cook slowly on low fire for 10 minutes. Add crab meat, half an half, cream of celery soup, Worcestershire Sauce, corn Tabasco and Beazell's . Cook slowly for 20 minutes. Then enjoy!!