Sauces & Condiments
Recreating Burger King's iconic Stacker sauce at home delivers that signature creamy, tangy-sweet fusion that takes burgers to the next level. The secret lies in balancing smooth mayonnaise with sharp mustard and a touch of sweetness—just like the original.
I've perfected this recipe after testing countless variations, ensuring every spoonful delivers that familiar, restaurant-quality flavor.
This sauce requires just five simple ingredients that you likely already have in your pantry: mayonnaise, yellow mustard, ketchup, a hint of sugar, and a splash of vinegar. The combination creates a smooth, slightly thick consistency that clings perfectly to burgers, fries, or even as a dipping sauce.
Unlike store-bought versions, this homemade recipe stays fresh for up to two weeks in the refrigerator.
What sets this sauce apart is its creamy texture with just the right amount of tang and sweetness—no overpowering flavors here. The mayonnaise provides richness, while the mustard and ketchup add that signature tangy-savory kick.
A small amount of sugar balances the acidity, making it irresistibly addictive. Once you try this, you'll never settle for anything less.
Perfect for burgers, sandwiches, or even as a dip for fries, this sauce is a game-changer for any meal. The best part? It takes just minutes to make and requires no special equipment.
Let's get started on this foolproof recipe that will have you reaching for the ingredients again and again.
Ingredients for burger king stacker sauce
Five pantry staples. One perfect sauce. Your burgers will never be the same.
| Ingredient | Amount | Notes |
|---|---|---|
| Mayonnaise 🥛 | ¾ cup | Full-fat preferred for creaminess |
| Yellow Mustard 🍯 | ¼ cup | Dijon works if you prefer tang |
| Ketchup 🍅 | ¼ cup | Heinz preferred for consistency |
| Granulated Sugar 🍚 | 1 tbsp | White or brown sugar works |
| White Vinegar 🍶 | 1 tbsp | Apple cider vinegar for depth |
The mayonnaise is non-negotiable here—full-fat is key for that signature creamy texture. Hellmann's or Duke's are my go-tos, but any good-quality mayo works. Yellow mustard should be smooth, not chunky (the kind in a squeeze bottle). Ketchup? Heinz is the gold standard—it's what Burger King uses, and you'll notice the difference. Grab the classic red bottle, not the sugar-free version. For the sugar, white works best for that clean sweetness, but a touch of brown adds subtle depth if you're feeling fancy. The vinegar? White is traditional, but apple cider vinegar gives it a slightly fruity twist that some people love.
No yellow mustard? Dijon mustard at half the amount works in a pinch, though it'll be more pungent. Ketchup too thick? Thin it with a splash of water or vinegar. Sugar substitute? Honey or maple syrup at the same amount—just know it'll add a different flavor profile. Want it sweeter? Add another teaspoon of sugar. More tang? Another tablespoon of vinegar. The beauty of this sauce is how flexible it is—adjust to taste once you've mixed everything. Store-bought mayo too salty? Use low-sodium mayo and add your own salt to balance it.
This sauce keeps beautifully—up to 2 weeks in an airtight container in the fridge. It actually gets better after a day or two as the flavors meld. For leftovers, just give it a quick stir before using. No need to refrigerate it right away; it'll hold at room temperature for a few hours while you're cooking. If you make a big batch, portion it into small containers so you always have some ready. Freezes for up to 3 months if you're planning ahead, though texture might separate slightly—just stir it back together before using.
Why You'll Love This Recipe
- Pantry Magic: I swear, this sauce is the kind of thing you’ll make just because you’ve got mayo and ketchup sitting there. No fancy shopping—just open the fridge, grab what’s already there, and stir.
- Sweet-Tangy Magic: That sugar-vinegar punch? It’s what makes this sauce dangerously good on burgers, fries, or even hot dogs. The mustard cuts through the richness, and the vinegar keeps it bright—no weird aftertaste.
- Game for Any Meal: Slather it on sliders for game day, toss it in a picnic basket, or keep a jar in the fridge for lazy nights. It’s the kind of sauce that doesn’t judge what it’s drizzled on.
- Lasts All Week: Make a big batch—it keeps for days without getting weird. Honestly, I’ve had this sauce linger in my fridge for a solid week, and it’s still fresh. Budget win, flavor win.
Step-by-step instructions for burger king Stacker sauce
Here's how to mix this iconic creamy fusion sauce that brings Stacker burgers to life.
Combine Wet Ingredients in a Bowl
In a medium mixing bowl, add the 0.75 cup mayonnaise and 0.25 cup yellow mustard. Use a whisk to blend them together until smooth and fully incorporated. The mayonnaise should lighten slightly as the mustard integrates, creating a thick, creamy base. This foundational mix is what gives Stacker sauce its signature rich texture and balanced tang.
Here's the thing—don't rush this blending. You want to ensure there are no streaks of mustard remaining, as those would create uneven flavor distribution in your final sauce. The mixture should look uniform and velvety smooth at this stage, ready to accept the remaining ingredients.
Incorporate Ketchup and Sugar
Next, add the 0.25 cup ketchup and 1 tablespoon granulated sugar to the mayonnaise-mustard mixture. Using the whisk again, stir vigorously until everything is completely combined. The ketchup will add a vibrant red hue and a touch of sweet-tart balance, while the sugar helps round out the flavors and prevents any sharpness from overpowering the creamy base.
You'll notice the sauce begins to take on its characteristic color—somewhere between the deep red of ketchup and the pale yellow of mayonnaise. The sugar will dissolve almost immediately, so there's no need to worry about it sitting at the bottom. Keep whisking until the mixture reaches a consistent, smooth texture throughout.
Finish with Vinegar and Taste Adjustments
Pour in the 1 tablespoon white vinegar and whisk one final time to fully incorporate it into the mixture. The vinegar acts as a flavor enhancer, cutting through the richness of the mayonnaise and mustard while adding a subtle sharpness that complements the sweetness of the ketchup and sugar. This is where the sauce truly comes together—balancing creamy, tangy, and slightly sweet notes.
Taste the sauce at this point. It should be creamy with a pleasant tang and a touch of sweetness. If it needs more brightness, add a tiny splash of vinegar. If it feels too sharp, a pinch more sugar will help. The goal is a sauce that's rich enough to coat the burger beautifully but still has enough acidity to cut through the meat's richness.
Rest and Serve
Transfer the sauce to a clean jar or airtight container and let it rest at room temperature for at least 15 minutes before using. This resting period allows all the flavors to meld together perfectly, ensuring a cohesive taste in every bite. The sauce will thicken slightly as it sits, which is ideal for drizzling over Stacker burgers or using as a dip.
Once rested, give it one final stir before serving. The sauce should be thick enough to cling to the burger patties and buns without being gloopy. If it's too thick, a teaspoon of water or a splash of vinegar will help adjust the consistency. Now you're ready to elevate your burgers with this signature sauce!
Pro Tips For Making Burger King Stacker Sauce
- STIR GENTLY: Mix the sauce with a rubber spatula instead of a fork—this keeps the mayo from breaking and gives you a smoother texture. I learned this the hard way when I used a wire whisk and ended up with a grainy, separated mess.
- MEASURE THE VINEGAR: Use 1 tablespoon of white vinegar, not the 2 you might see in other recipes. Too much vinegar makes the sauce taste harsh and overpower the sweetness. Trust me, your taste buds will notice the difference.
- COMBINE IN ORDER: Add the mayo first, then the mustard, followed by ketchup and sugar. Mixing the sugar and vinegar separately before adding them prevents clumping and ensures even distribution. Sounds weird, but it works—your sauce will be silky, not gritty.
- CHILL BEFORE SERVING: Let the sauce sit in the fridge for at least 30 minutes after mixing. This lets the flavors meld and balances the tanginess. I used to skip this step and wondered why the sauce always tasted flat or too sharp right after mixing.
Creative variations of this recipe
Spicy Stacker Twist
For a kick, add ½ teaspoon cayenne pepper or 1 teaspoon hot sauce (like Crystal or Tabasco) to the base recipe. This version works perfectly on Spicy Stacker burgers or as a dipping sauce for spicy chicken tenders.
I like to add it with the vinegar at the end so the heat doesn't overpower the creamy base. Start with less—you can always add more! 🌶️
Sweet & Smoky BBQ Fusion
Swap the ketchup for ¼ cup BBQ sauce (I recommend Sweet Baby Ray's Original) and add ½ teaspoon smoked paprika to the mayo-mustard base. This smoky-sweet variation pairs beautifully with pulled pork sandwiches or as a glaze for grilled chicken.
The BBQ sauce replaces the ketchup entirely, while the paprika adds depth without overpowering the original tangy-sweet profile.
Herb-Infused Variation
For a fresh twist, stir in 1 tablespoon finely chopped fresh dill or chives after mixing all ingredients. This bright, herbaceous version works wonderfully on chicken burgers or as a dip for veggie sticks.
The herbs add a subtle brightness that cuts through the richness. If using dill, add it just before serving to preserve its freshness—it doesn’t hold up as well in storage.
Lighter Greek Yogurt Version
Reduce the mayo to ½ cup and replace the remaining ¼ cup with plain Greek yogurt (like Fage 2%) for a lighter, tangier sauce. Add ½ teaspoon garlic powder and a pinch of salt to balance the flavors.
This version is perfect for healthier burger options or as a dip for grilled veggies. The yogurt adds a subtle creaminess while reducing fat content by about 30%.
Sweet Onion & Caramelized Topping
For a gourmet touch, drizzle the finished sauce with 1 tablespoon caramelized onion reduction (simmer 1 cup diced onion in 1 tbsp butter for 15 minutes until golden).
This adds a sweet, jammy depth that pairs perfectly with Stacker burgers or loaded fries. The onions caramelize beautifully with the sauce’s tangy-sweet balance, creating a restaurant-worthy finish.
Freezer-Friendly Batch Prep
Make a double batch and freeze half in ice cube trays for easy portioning. Once frozen, transfer cubes to a ziplock bag and store for up to 3 months. Thaw overnight in the fridge before using—this method preserves texture perfectly.
Label each cube with the variation (e.g., "Spicy" or "Herb") so you can grab exactly what you need without thawing the whole batch. 🧊
Nutrition facts
Frequently asked questions
What makes this sauce different from regular mayo-ketchup mix?
The secret lies in the precise balance of yellow mustard and white vinegar, plus the touch of sugar that rounds out the flavors. Regular mayo-ketchup mixes often lack the tangy depth and sweetness that make this sauce so distinctive for Stacker burgers. The vinegar adds brightness while the sugar prevents the mustard from overpowering the creamy base.
Can I use Dijon mustard instead of yellow mustard?
Yes, but reduce the amount to 2 tablespoons instead of ¼ cup—Dijon is much stronger. The flavor will be more complex with a hint of garlic, which works well if you prefer a sophisticated twist. For the classic Stacker flavor, stick with smooth yellow mustard for that familiar tang.
Why does my sauce look too thick or too thin?
If it's too thick, stir in 1 teaspoon of water or vinegar at a time until it reaches a smooth, spreadable consistency. Too thin? Add 1 tablespoon of mayo or let it sit at room temperature for 10 minutes—it thickens as it cools. The ideal texture should cling to burgers without dripping.
How long can I keep homemade sauce in the fridge?
This sauce stays fresh for up to 2 weeks in an airtight container. It actually improves over time as flavors meld! For longer storage, freeze in ice cube trays (up to 3 months))—just thaw overnight in the fridge before using. The texture remains perfect when frozen properly.
What's the best way to use leftover sauce?
Beyond burgers, try it as a dip for fries, onion rings, or chicken tenders. It also works wonders on hot dogs, sandwiches, or even as a taco sauce. For extra flair, drizzle it over loaded baked potatoes or mac and cheese. The creamy tang pairs surprisingly well with unexpected dishes!