Slow Cooker Seafood Bisque

You might also enjoy this homemade lentil soup, some air fryer crab cake egg rolls or this Italian style tomato soup.

Slow Cooker Seafood Bisque Ingredients

A complete list of ingredients and amounts can be found in the recipe card below.

Whole cooked lobster: Don’t discard the shell after removing the meat. It’s simmered with the vegetables and stock to build a much deeper seafood flavor in the bisque. Keep the cooked lobster meat refrigerated until you’re ready to finish the soup.
Crabmeat: Alaskan king crab makes this especially luxurious, but good-quality lump crabmeat also works. Check it carefully for any small pieces of shell before adding it.
Lobster tails: These cook in the broth toward the end, giving you more tender lobster meat without leaving it in the slow cooker for hours.
Tomatoes: Italian-style diced tomatoes and fresh cherry tomatoes give the bisque its tomato base and are blended until smooth before the cream goes in.
Old Bay Seasoning: I love this classic seafood seasoning here because it brings plenty of savory, slightly spicy flavor without needing a long list of separate spices.
Heavy cream: Add this only after the soup base has been blended. It gives the finished bisque its rich, silky texture without spending hours in the slow cooker.

How to Make Slow Cooker Seafood Bisque

For more detailed instructions with weights and measurements, jump to the printable recipe card.

Make the lobster broth: Remove the meat from the cooked whole lobster and refrigerate it with the crabmeat. Crush the lobster shell, then sauté it with the celery and red onion before adding the vegetable stock and simmering. Strain the broth and discard the shells.
Add the aromatics: Cook the butter, rice wine vinegar, shallot and garlic, then stir them into the lobster broth.
Start the slow cooker: Add the broth, tomatoes and seasonings to the slow cooker and cook on low for 5 hours.
Cook the lobster tails: Add the reserved lobster tails during the final 30 minutes. Once cooked, remove the meat from the shells and chop it.
Blend the bisque: Use an immersion blender to blend the tomato broth until smooth.
Finish with the seafood: Stir in the heavy cream, chives, chopped lobster and crabmeat. Taste and adjust the seasoning before serving.
Garnish: Finish with fresh parsley, Parmesan and croutons if you like.

Substitutions and Variations

Other seafood: Shrimp or scallops can replace some of the lobster or crab, but add them toward the end so they don’t overcook during the long slow-cooker time.
Crabmeat: Good-quality canned or refrigerated lump crabmeat works if king crab isn’t available. Drain it well and check carefully for shell pieces.
Adjust the heat: Reduce or omit the red pepper flakes for a milder bisque, or add a pinch of cayenne if you prefer more heat.
Fresh herbs: Tarragon is especially good with lobster and can be used instead of, or along with, the chives.
Gluten-free: The bisque itself can easily be gluten-free. Check the vegetable stock, Old Bay and other packaged ingredients as needed, and either skip the croutons or use gluten-free ones.

Serving Suggestions

With bread: You can serve it with homemade Irish soda bread, classic focaccia or mushroom focaccia.
With a salad: Pair it with a contrasting salad, perhaps lemon and parmesan chopped salad or this charred zucchini salad.

How to Store Seafood Bisque

Store: Keep leftover seafood bisque in an airtight container in the refrigerator for up to 3 days.
Freeze: You can freeze the bisque, although the cream may separate slightly and the seafood can become less tender after thawing. For the best texture, I prefer this soup freshly made or refrigerated rather than frozen.
Thaw: Defrost frozen bisque overnight in the refrigerator.
Reheat: Warm it gently in a saucepan over low heat, stirring frequently. Avoid boiling it, which can make the cream separate and the lobster and crab tough.