“She-crab” alludes to the traditional use of female crabs in this soup, along with their ruby-red roe. To use fresh crabs (and, potentially, their roe) you will need approximately 6 pounds blue crabs or 4 pounds Dungeness crabs. Poach or boil if necessary, crack the shells and pick the meat out, and proceed as directed, adding any roe along with the crabmeat.
Melt in a large saucepan over low heat:
Whisk in:
Cook, whisking, until the flour smells toasted but is not browned, about 3 minutes. Remove the pan from the heat and slowly whisk in:
Return to the heat, bring to a simmer, and cook over medium-low heat whisking constantly, until thickened and smooth. Reduce the heat to low and stir in:
Adjust the seasonings. Heat gently just until the crab is warmed through. Garnish with: