In a large pot melt 5 tablespoons butter over medium heat. Add 1 small diced onion, 2 stalks diced celery, and 1 diced carrot. Cook, stirring, until veggies are soft, 8–10 minutes.
Flavor Base
Stir in 2 tablespoons tomato paste and 2 minced garlic cloves. Cook, stirring, until fragrant, 2 minutes.
Thickening
Sprinkle 3 tablespoons all-purpose flour into the pot. Stir and cook 1–2 minutes.
Pour in ½ cup dry white wine, scraping up any browned bits. Cook until wine is reduced by half, about 3 minutes.
Simmer
Stir in 4 cups seafood stock. Bring to a simmer, then reduce heat to low and simmer for 20 minutes.
Use an immersion blender to puree until smooth.
Finish
Stir in 1½ cups heavy cream, ½ teaspoon Old Bay seasoning, ¼ teaspoon smoked paprika, and a pinch of cayenne. Bring to a gentle simmer.
Add 1 pound lump crab meat and warm until heated through, 2–3 minutes. Avoid boiling.
Season with salt and pepper to taste. Garnish with fresh chopped parsley before serving.
Notes
For best flavor, refrigerate the bisque overnight in an airtight container to let the spices meld.Freeze any leftovers for up to 2 months. Thaw in the refrigerator before gently reheating.Cool to room temperature before storing and refrigerate within two hours to ensure food safety.