Set up a steamer on the stovetop – steamer insert should be 2-3 inches above
the liquid in the bottom of the pan.
Whisk together beer, vinegar, water and 1 tablespoon Old Bay in the bottom of
the steamer. Bring to a simmer over medium heat.
Layer crabs on the steamer insert, seasoning each layer with the remaining Old Bay Seasoning and salt. Cover and steam 25-30 minutes, until bright orange with no hints of blue or green. Serve with mallets and picks on newspaper-lined table.