Garlic Butter Seafood Boil Sauce (Cajun) | CookOS

Garlic Butter Seafood Boil Sauce

Name: Garlic Butter Seafood Boil Sauce (Cajun)
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Yield: 6 servings
Cuisine: Cajun
Ingredients: 12 oz andouille sausage, sliced; 1 large onion, pureed; 1 head garlic, minced; 1 shallot, finely diced; 1 whole lemon, juiced; 3 sticks unsalted butter (1.5 cups); 2 tbsp paprika; 2 tbsp garlic powder; 2 tbsp onion powder; 1 tbsp cayenne pepper; 1 tbsp red pepper flakes; 1 tbsp dried oregano; 1 tbsp black pepper; 1 cup seafood stock; 1 cup heavy cream

A rich, spiced garlic butter sauce built with andouille sausage, pureed onion, and Cajun seasonings—designed specifically for pouring over or dipping crawfish, lobster, and shrimp.

🌍Cajun 🏷️Seafood boil 🏷️Garlic butter sauce 🏷️Creole 🏷️Spicy Creamy

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Total

30 min

Servings

Difficulty

Easy

Est. Cost

$28–$46

Recipe Source

View original recipe

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Ingredients

12 oz andouille sausage, sliced
1 large onion, pureed
1 head garlic, minced
1 shallot, finely diced
1 whole lemon, juiced
3 sticks unsalted butter (1.5 cups)
2 tbsp paprika
2 tbsp garlic powder
2 tbsp onion powder
1 tbsp cayenne pepper
1 tbsp red pepper flakes
1 tbsp dried oregano
1 tbsp black pepper
1 cup seafood stock
1 cup heavy cream

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Instructions

1
In a large pan, grill the sliced andouille sausage until browned. Remove the sausage and set aside, leaving the rendered fat in the pan.
2
To the same pan, add the pureed onion and cook for a few minutes.
3
Add the minced garlic and finely diced shallot to the pan and sauté until fragrant.
4
Squeeze the juice of one whole lemon into the pan.
5
Add three sticks of butter and allow it to melt completely.
6
Add all the seasonings (paprika, garlic powder, onion powder, cayenne, red pepper flakes, oregano, black pepper) and stir until well incorporated into the butter and aromatics.
7
Pour in the seafood stock and stir to combine.
8
Gradually pour in the heavy cream while stirring, adding just enough to reach your desired consistency.
9
Bring the sauce to a boil, then reduce the heat and let it simmer for about 5 minutes.
10
Turn off the heat and let the sauce rest for a few minutes to thicken.
11
Serve the sauce by pouring it over your seafood boil or as a dipping sauce on the side.

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Tips & Notes

Pro tips

Puree the onion completely for a smooth sauce without chunks; a food processor or blender works fastest.
Use unsalted butter so you control the salt level; add sea salt to taste at the end if needed.
Keep the heat on medium to medium-low when combining ingredients to prevent the butter from breaking or browning.
Toast the paprika, garlic powder, onion powder, and cayenne in the butter for 1–2 minutes before adding pureed onion to bloom their flavors.

Substitutions

Andouille sausage → smoked sausage or kielbasa (similar smokiness and texture)
Fresh lemon juice → white wine or white vinegar (adds acidity; use 2 tablespoons)
Unsalted butter → salted butter (omit additional salt if added later)
Cayenne pepper → hot sauce or red pepper flakes (adjust quantity to taste preference)

Storage & make-ahead

Refrigerate in an airtight container up to 3 days. Reheat gently over low heat, stirring frequently to prevent separation, or microwave in 20-second bursts.

Common Questions

Can I make this sauce ahead of time?

Yes. Make it up to 2 days ahead, refrigerate in an airtight container, and gently reheat over low heat or in a saucepan, stirring occasionally to prevent separation.

Will the butter separate when it cools?

Butter naturally separates as it cools. Keep the sauce warm on low heat or reheat gently before serving to maintain a creamy, unified texture.

Can I substitute the andouille sausage?

Yes. Use smoked sausage, kielbasa, or omit it entirely for a vegetarian garlic butter sauce; the flavor will shift but the technique remains the same.

How spicy is this sauce?

With 1 tablespoon cayenne pepper, it has a noticeable kick. Reduce cayenne to ½–¾ tablespoon for less heat, or increase to 1½ tablespoon for more spice.