cooking spray
3 tablespoons butter
½ cup diced celery
¼ cup minced onion
½ teaspoon paprika
¼ teaspoon seafood seasoning (such as Old Bay®)
¼ teaspoon ground thyme
¼ teaspoon kosher salt, or to taste
⅛ teaspoon ground white pepper
¼ cup rice flour
1 cup seafood stock, or more as needed
1 pint half-and-half
1 pint heavy whipping cream
½ cup milk (Optional)
2 cups cooked crabmeat
Spray a stockpot with cooking spray.
Melt butter in the prepared stockpot over medium heat; cook and stir celery, onion, paprika, seafood seasoning, thyme, salt, and white pepper until onion is translucent, about 5 minutes. Whisk flour into vegetable mixture until smooth and dissolved. Pour seafood stock over vegetable mixture.
Mix half-and-half, cream, and milk into broth mixture; decrease heat and simmer until bisque is thickened, about 15 minutes. Add crabmeat and simmer bisque until crabmeat is heated through, about 5 minutes more.