This seafood boil sauce is a garlic- and butter-forward butter sauce with a touch of heat and bright lemon that complements any seafood boil. It comes together quickly with just a few pantry staples and elevates shrimp, crab, crawfish, lobster, or any seafood you’re serving.
Ready in about 20 minutes, this easy sauce is rich and savory while staying balanced. Use it poured over a seafood boil, as a dip for crab legs or lobster tails, or spoon it over pan-seared shrimp.
Table of Contents
- Ingredients
- Tips
- How to make Seafood Boil Sauce
- What to serve with Seafood Boil Sauce
- Recipe FAQs
- More Seafood Recipes
- Seafood Boil Sauce Recipe
This sauce is ideal for any seafood boil — crab, crawfish, shrimp, or lobster — and also makes a delicious dipping sauce. It’s flavorful enough to replace restaurant sauces at home and simple enough to prepare any weeknight.
From start to finish the recipe takes about 20 minutes, so you’ll have a warm, savory sauce ready to pour over your seafood in no time.
Ingredients
A handful of simple ingredients creates a flavorful, balanced sauce:
- Butter: the base of the sauce. Salted butter is used here, but use unsalted if you prefer to control seasoning.
- Yellow onion and fresh garlic: finely diced to release aromatic flavor as they cook in the butter.
- Seafood seasoning mix: a blend of Cajun seasoning, Old Bay, onion powder, and red pepper flakes—plus salt and black pepper to taste.
- Brown sugar: a small amount rounds and balances the savory and salty elements without making the sauce taste sweet.
- Chicken stock: adds depth and thins the sauce slightly; chicken broth works as well.
- Lemon juice: brightens the sauce with a fresh citrus note.
Tips
- Adjust heat: change the red pepper flakes to suit your taste. For more heat, add a dash of hot sauce.
- Dice finely: finely chop the onions and garlic so they melt into the butter and release their flavors.
- Thin the sauce: add up to 1/2 cup extra chicken stock if you prefer a looser consistency.
- Watch seasoning: Cajun blends vary in saltiness. Taste as you go to avoid over-salting.
- Add umami: a splash of Worcestershire sauce can deepen the savory profile if desired.
How to make Seafood Boil Sauce
- Melt butter in a large skillet over medium heat. Add the diced onion and cook for about 5 minutes until softened. Stir in the garlic and cook another 2–3 minutes.
- Add Cajun seasoning, Old Bay, onion powder, brown sugar, and red pepper flakes. Cook, stirring, for about 5 minutes to bloom the spices. Pour in the chicken stock, bring to a gentle boil, then reduce heat and simmer 6–8 minutes until slightly thickened.
- Remove from the heat, stir in lemon juice and chopped parsley. Pour the sauce over cooked seafood or serve alongside as a dipping sauce.
What to serve with Seafood Boil Sauce
This sauce pairs well with any fresh seafood. Try it with a classic seafood boil, pan-seared shrimp, low-country boil, baked lobster tails, or snow crab legs.
- Seafood Boil
- Pan Seared Shrimp
- Low Country Boil
- Salmon New Orleans
- Shrimp and Broccoli Skillet
- Boom Boom Sauce as a contrasting dip
Recipe FAQs
This sauce is made from butter, onion, garlic, Cajun seasoning, Old Bay, onion powder, red pepper flakes, brown sugar, chicken stock, lemon juice, and fresh parsley.
Gently reheat on the stovetop over low heat for the best texture. Alternatively, microwave in 20–30 second intervals, stirring between bursts to prevent scorching.
More Seafood Recipes
- Crawfish Boil Recipe
- Coconut Shrimp with Dipping Sauce
- Crispy Shrimp Po’boy with Old Bay Sauce
- Creamy Salmon Pasta
- Cajun Shrimp Tacos with Garlic Lime Ranch
- Pesto Shrimp Pasta with Sun-dried Tomatoes
Seafood Boil Sauce Recipe
Equipment
-
Large Skillet
Ingredients
- 2 cups Salted Butter
- 1 Onion, diced
- 8 cloves Garlic, diced
- 1/4 cup Cajun Seasoning
- 2 tbsps Old Bay
- 1 tbsp Onion Powder
- 1 1/2 tbsps Brown Sugar
- 1 tbsp Red Pepper Flakes
- 1 cup Chicken Stock
- 2 tbsps Lemon Juice
- 2 tbsp Fresh Parsley, chopped
Instructions
-
Melt butter in a large skillet over medium heat. Add diced onion and cook about 5 minutes until softened. Add garlic and cook 2–3 minutes more.
-
Stir in Cajun seasoning, Old Bay, onion powder, brown sugar, and red pepper flakes. Cook 5 minutes, then add chicken stock. Bring to a simmer and cook 6–8 minutes to reduce slightly.
-
Remove from heat, stir in lemon juice and parsley. Pour over cooked seafood or serve as a dipping sauce.
Notes
- Adjust spice by changing red pepper flakes or adding hot sauce.
- Dice finely so onion and garlic blend into the butter.
- Thin with stock if you prefer a looser sauce.
- Taste as you go because premixed seasonings vary in salt level.
- Optional: add Worcestershire for extra umami.
Nutrition
Nutrition information is automatically calculated and should be used as an approximation.