Inspired by Long John Silver’s classic seafood pairing, this homemade tartar sauce delivers the same tangy, creamy flavor you love—without the restaurant price. I’ve perfected the balance of briny capers, sweet relish, and zesty lemon to create a condiment that elevates fried fish, shrimp, or even crispy fries.
The secret is in the texture: finely chopped ingredients suspended in rich mayonnaise for a smooth yet slightly chunky consistency. This version stays fresh in the fridge for up to a week, making it ideal for meal prep or seafood nights. One taste and you’ll never reach for store-bought again.
Ingredients for Long John Silver’s Tartar Sauce
Just ten ingredients to recreate that iconic tangy, creamy seafood sauce you crave.
| Ingredient | Amount | Notes |
|---|---|---|
| Mayonnaise 🥫 | 1 ½ cups | Full-fat for best texture |
| Sweet Relish 🥒 | ⅓ cup | Green or dill variety |
| Capers 🌿 | 2 tbsp | Drained and chopped |
| Fresh Lemon Juice 🍋 | 2 tbsp | Newly squeezed preferred |
| Dijon Mustard 🟡 | 1 tbsp | Smooth variety, not grainy |
| White Onion 🧅 | ¼ whole | Finely diced |
| Fresh Dill 🌿 | 1 tbsp | Chopped, or 1 tsp dried |
| Worcestershire Sauce 💧 | 1 tsp | Vegan if preferred |
| Hot Sauce 🔥 | ½ tsp | Like Tabasco, optional |
| Kosher Salt 🧂 | ½ tsp | Adjust to taste |
| Freshly Ground Black Pepper 🌶️ | ¼ tsp | To taste |
The mayonnaise is the foundation here—Duke’s or Hellmann’s give that classic rich base. I grab mine at Costco for the best value (the big jar lasts forever). Capers are non-negotiable for that briny kick; look for them near the olives at Whole Foods or Trader Joe’s. The relish needs to be sweet but not neon-green—Heinz or Mount Olive are solid picks. Fresh lemon juice matters more than you’d think; those plastic lemon bottles won’t cut it (trust me, I’ve tried).
No capers? Finely chopped cornichons work in a pinch. Out of Dijon? Yellow mustard plus a pinch of cayenne gets you close. The dill is flexible—dried at one-third the amount if fresh isn’t handy. For a smokier twist, add ½ tsp smoked paprika. Worried about the raw onion? Soak the diced pieces in cold water for 10 minutes to mellow them out. And if you’re avoiding anchovies, check your Worcestershire—Annie’s makes a vegan version.
This keeps 7 days in a sealed jar—perfect for meal prep. The flavor actually improves after 24 hours as everything melds. Store-bought mayo separates faster, so give it a good stir before using. I like to portion it into small containers for easy grab-and-go with fish tacos or fried shrimp. Freezing isn’t ideal (mayonnaise doesn’t love it), but you can freeze the base without mayo and add it fresh later.
Why You’ll Love This Recipe
- No-Fuss Mixing: I dump everything in one bowl—mayo, relish, capers, lemon, mustard—and stir. No blender, no fancy steps, just five ingredients and a spoon.
- That Tangy Kick: The lemon juice and Dijon cut through the richness of the mayo, while the capers add this briny pop. Honestly, it’s the closest I’ve gotten to the real deal without a deep fryer.
- Fish Fry MVP: I slather this on crispy fish sticks for the kids, drizzle it over grilled salmon for date night, and even sneak it into tuna salad when I’m bored. One sauce, three totally different meals.
- Stays Fresh Longer: Between us, I make a double batch because it keeps for over a week in the fridge. That’s seven days of no last-minute sauce stress when the fish craving hits.
Step-by-Step Instructions for Long John Silver’s Tartar Sauce
Making this tangy copycat sauce is easier than you think—just follow these simple steps.
Step 1: Prepare the Aromatic Base
Start by finely dicing the 0.25 whole white onion into pieces no larger than ⅛ inch. I like to use a sharp chef’s knife for this—it gives you more control than a food processor. Place the diced onion in a medium bowl along with the 2 tbsp capers. If your capers are whole, give them a rough chop to break them up slightly.
Add the 1 tbsp fresh dill to the bowl. If you’re using dried dill instead, reduce it to 1 tsp since dried herbs are more concentrated. The dill adds that signature brightness that makes this sauce special. Stir these ingredients together and set aside while you prepare the wet components.
Step 2: Create the Tangy Foundation
In a separate large bowl, combine the 1.5 cups mayonnaise, 0.33 cup sweet relish, and 1 tbsp Dijon mustard. I always use full-fat mayonnaise here—it gives the sauce that rich, creamy texture that perfectly coats seafood. Whisk these together until completely smooth with no streaks of mustard visible.
Now add the 2 tbsp fresh lemon juice, 1 tsp Worcestershire sauce, and 0.5 tsp hot sauce. The lemon juice should be freshly squeezed if possible—it makes a noticeable difference in brightness. Whisk again until everything is fully incorporated. You’ll notice the color lighten slightly as the acids react with the mayonnaise.
Step 3: Combine and Balance the Flavors
Pour the onion-caper-dill mixture into the bowl with the wet ingredients. Add the 0.5 tsp kosher salt and 0.25 tsp freshly ground black pepper. Gently fold everything together with a silicone spatula until all the components are evenly distributed throughout the sauce.
Here’s the thing—taste as you go. The sauce should have a perfect balance of tangy, sweet, and briny flavors. If it needs more brightness, add another ½ tbsp lemon juice. If it’s too sharp, a pinch more sweet relish will mellow it out. Remember that flavors will meld and intensify slightly after chilling.
Step 4: Chill for Optimal Flavor Development
Transfer the tartar sauce to an airtight container and refrigerate for at least 1 hour before serving. I know it’s tempting to dive right in, but this chilling time is crucial. It allows all the flavors to marry together and the onions to mellow slightly, giving you that authentic Long John Silver’s taste.
The sauce will keep in your refrigerator for up to 5 days, though it’s always best within the first 48 hours when the flavors are most vibrant. Give it a quick stir before serving—you might notice a slight separation, but that’s completely normal for homemade tartar sauce.
Health Benefits of long john silvers tartar sauce
Healthy Fats Boost
This sauce gets its creamy base from mayonnaise, which provides healthy fats that help your body absorb fat-soluble vitamins like A, D, E, and K. The 1.5 cups of mayo delivers about 24g of monounsaturated fats per serving, supporting heart health when enjoyed in moderation. I always choose mayo made with olive oil for an extra nutritional boost. 💪
Probiotic Potential
Those tangy capers and sweet relish aren’t just for flavor—they contain naturally fermented elements that may support gut health. The 2 tbsp capers provide beneficial plant compounds, while the relish’s vinegar base can aid digestion. I’ve noticed my digestion feels lighter when I include fermented ingredients like these regularly.
Vitamin C Kick
Between the fresh lemon juice and white onion, you’re getting a surprising dose of vitamin C—about 15% of your daily needs per serving. The 2 tbsp lemon juice alone provides 12mg of vitamin C, which supports immune function and skin health. It’s why this sauce feels so refreshing with seafood! 🍋
Antioxidant Benefits
The fresh dill and capers pack antioxidant power. Dill contains flavonoids that help combat oxidative stress, while capers are rich in quercetin—a compound linked to reduced inflammation. Even the Worcestershire sauce contributes trace minerals like iron and zinc. Small amounts add up when you enjoy this sauce regularly.
Low-Calorie Flavor
At about 90 calories per 2-tbsp serving, this sauce delivers big flavor without excessive calories. The briny capers and zesty lemon juice mean you can use less sauce while still satisfying your taste buds. I often find myself using half the amount I would with store-bought versions.
Omega-3 Support
When paired with seafood, this sauce becomes part of a meal rich in omega-3 fatty acids. The healthy fats in the mayo help your body absorb the omega-3s from fish more effectively. It’s why this combo feels so satisfying—your body is getting more nutritional value from the meal as a whole. ✨
Nutrition Facts
Frequently Asked Questions
How long does homemade tartar sauce last in the fridge?
Your homemade version stays fresh for 5-7 days in an airtight container. The fresh ingredients like lemon juice and onion mean it won’t keep as long as store-bought. Always give it a good stir before using, as some separation is normal.
Can I make this without capers?
Substitute with 1 tbsp finely chopped cornichons or 1 tsp green olives for similar briny flavor. If avoiding pickled items entirely, add ½ tsp white vinegar plus extra lemon zest for brightness. The texture will be slightly different but still delicious.
Why does my sauce taste too sweet?
Sweet relish is likely the culprit. Balance it by adding 1 tsp lemon juice or ½ tsp Dijon mustard. For future batches, reduce relish to ¼ cup and add 1 tbsp dill pickles for tang. Taste as you adjust!
What’s the best way to fix a runny consistency?
Chill it for 2 hours first—it often thickens as ingredients meld. If still loose, fold in 1-2 tbsp Greek yogurt or more mayo. Avoid adding flour or cornstarch, as they’ll mute the flavors. The ideal texture should coat a spoon but still drip slowly.
Can I use dried dill instead of fresh?
Yes, but reduce to 1 tsp dried since it’s more concentrated. Rehydrate it first by mixing with 1 tsp lemon juice and letting sit 5 minutes. Fresh dill gives brighter flavor, but dried works in a pinch—just add it earlier to bloom.
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