Heat the olive oil in a large pot over medium heat, and saute the shallots and garlic until tender. Pour in the chicken broth, and bring to a boil. In a small bowl, mix the milk and flour. Stir the mixture into the pot, and continue cooking until soup is slightly thickened.
Step 2
Season the soup with cayenne pepper, salt, and pepper. Mix in the crab and whiskey, and cook until heated through.