Melt the butter over medium heat in a large heavy pot. Add the corn flour and onions and cook, stirring, until lightly browned and smelling of toasted nuts, about 4 minutes. Stir in the sugar, garlic powder, onion powder and black pepper. Immediately add the cream, corn and 4 quarts of water. Let simmer over medium heat, stirring occasionally, until thickened and the corn is cooked and tender, about 40 minutes. Taking care, blend the bisque in batches until smooth. Add the salt and pepper to taste. To serve, divide the crabmeat among 6 bowls and top with the hot bisque (which will lightly cook the crab). Garnish with the green onions.
You can find yellow corn flour in the baking or Latin food section of the supermarket.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
When blending hot liquid, first let it cool for five minutes or so, then transfer it to a blender, filling only halfway. Put the lid on, leaving one corner open. Cover the lid with a kitchen towel to catch splatters, and pulse until smooth.
Recipe courtesy of Chan's Wine World, Grand Boulevard, Miramar Beach, FL