Copycat Vegan Big Mac Special Sauce
All the nostalgic flavor, none of the dairy—this vegan special sauce brings Big Moc energy with pantry staples like mayo, relish, and mustard.
Two all-beef patties, special sauce, lettuce, cheese, pickles, onions…all on a sesame seed bun! If you grew up in the late '80s or early '90s, chances are you remember that jingle. It’s been over two decades since I’ve had a Big Mac, but I can still remember eating one on a Saturday morning with my dad and brother circa 1990—though let’s be real, we mostly just wanted to hit the playground!
My dad has always loved burgers, specifically Big Macs. So when I was looking for a way to get him to try one of my plant-based creations, I knew it had to be my “Big Moc” that would do the trick. And it was a hit! So much so that he now requests a bulk batch of this vegan special sauce—aka: Moc Sauce—to keep in his fridge. If that’s not a #plantbasedwin, I don’t know what is.
Why You’ll Love This Recipe
Only takes 5 minutes
Perfect for burgers, sandwiches, wraps, and dips
Stores beautifully in the fridge for up to 3 weeks
Tastes just like the original, but made plant-based
Dad-approved!
Ingredients You’ll Need
⅓ cup vegan mayo
3 tbsp ketchup
1 tbsp yellow mustard
2 tbsp sweet relish, finely chopped
½ tsp minced garlic (plus a splash of the oil/juice it’s packed in)
Onion powder, to taste
Salt & pepper, to taste
Optional additions:
Splash of white vinegar
Pinch of sugar (or just add more relish for sweetness or mustard for tang!)
How to Make It
In a bowl, combine all ingredients.
Stir well until smooth and fully mixed.
Taste and adjust seasoning—add more relish, mustard, or garlic as desired.
Store in a sealed container in the fridge for up to 3 weeks. (But trust me—it won’t last that long!)
Serving Suggestions
Slather on a vegan burger with shredded lettuce, pickles, and onions
Use as a dip for fries or roasted potatoes
Drizzle over tofu wraps or sliders
Dollop onto vegan meatloaf or grain bowls for extra flavor
Final Thoughts
This sauce is so good, I’ve been tempted to eat it with a spoon. Whether you’re recreating your own childhood McMemory or just looking to elevate your next veggie burger, this sauce delivers all the nostalgic comfort without any of the animal products. Big Moc energy, all day long.