Creamy, tangy, and with just the right amount of zip, this keto Big Mac sauce hits all the nostalgic fast-food notes but is cleaned up for your keto lifestyle. It’s the kind of homemade sauce that makes cheeseburgers, bowls, and lettuce wraps way more exciting. One taste and you’ll be dunking everything in it straight from the fridge.

A blue-rimmed mug filled with creamy, orange-colored sauce topped with a sprinkle of paprika sits on a wooden board next to a wooden spoon. Nearby are fresh tomatoes and a bowl of salad with onions and ground beef.

This low carb Big Mac sauce recipe was born when I was craving that classic flavor, but without weird ingredients or cloying sweetness.

My version uses simple ingredients you probably already have. It’s thick, spoonable, and easy to tweak. Thin it with pickle juice if you want to drizzle, or leave it thick if you’re having hamburgers. Either way, the whole family is going to love this homemade Big Mac sauce.

I use this sauce constantly. It is my favorite way to liven up a cheeseburger, and I love it over a keto Big Mac bowl. I’ve even used it as a dip with keto chicken tenders, and loved it.

A bowl with mayonnaise, ketchup, and mustard, next to small bowls containing chopped pickles, seasonings, and a small amount of pickle juice on a white surface.

Let’s Talk Ingredients

To keep this copycat big mac sauce keto, make sure you read the label on your ketchup. Look for the net carbs, and ingredients, and make sure it fits with your goals.

The dill pickles are my recommendation here. I don’t like this with sweet pickles at all, and I haven’t found a dill pickle relish that has clean ingredients. Because if this, I always buy Bubbies pickles and chop them.

I don’t add a sweetener to my big mac sauce, because I find that the ketchup is enough. If you taste the sauce and want yours sweeter, you can add ½ teaspoon to 1 teaspoon of your favorite keto-friendly sweetener.

Step-by-Step

A bowl with a messy mixture of mayonnaise, ketchup, chopped pickles, and spices, partially stirred with a silver fork on the right side. The plate has a rustic, crackled texture and worn edges. — Place the mayonnaise in a mixing bowl.
Add the keto-friendly ketchup, chopped dill pickles, yellow mustard, white vinegar, paprika, garlic powder, and sea salt.

A ceramic bowl with a crackled glaze contains a creamy, light orange sauce or dip. A metal fork rests inside the bowl, which is set on a white surface. — Stir until fully combined and smooth. Add pickle juice one teaspoon at a time to thin the keto Big Mac sauce if needed. Refrigerate to let the flavors settle before serving.

Tips & Tricks for Keto Big Mac Sauce

Want some heat?

I left this off of the recipe, since I am going for a copycat big mac sauce here, but a little heat is magical. If you are game, try ¼ teaspoon of cayenne pepper.

Yellow mustard only.

I don’t like this with Dijon. I tried it and wasn’t a fan. If you want that classic keto Big Mac sauce recipe flavor, yellow mustard is key.

Let it chill.

This sauce needs a little fridge time. Thirty minutes is fine. Overnight is good too. The flavors calm down and come together, and suddenly it tastes like the real thing.

Adjust the thickness for how you’re using it.

Thicker for burgers. Thinner for burger bowls, lettuce wraps, or drizzling. Pickle juice is your control knob here. Use it sparingly, I recommend just a teaspoon at a time.

If it tastes off, check the acid.

Most versions miss this. White vinegar matters. Swapping it changes the whole balance and pulls it away from the classic Big Mac sauce flavor people expect.

A wooden spoon lifts creamy, seasoned sauce from a blue-rimmed cup, with fresh vegetables and ground beef visible in the background.

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A blue mug filled with creamy, orange-colored queso dip topped with chili powder sits on a wooden board. Surrounding it are fresh tomatoes, a wooden spoon, and a bowl of ground beef, lettuce, and onions.

Print Recipe

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5-Minute Copycat Keto Big Mac Sauce

Prep Time5

Total Time5

Course: condiment, Sauce

Cuisine: American

Diet: Gluten Free

Servings: about a tablespoon

Calories: 66.45kcal

Author: Wendy Polisi

As an Amazon Associate I earn from qualified sales.

Ingredients

½ cup sugar-free mayonnaise
2 tablespoons keto-friendly ketchup
2 tablespoons chopped dill pickles plus pickle juice for thinning.
2 teaspoons yellow mustard
1 teaspoon white vinegar
½ teaspoon paprika
¼ teaspoon garlic powder
¼ teaspoon sea salt

Instructions

Place the mayonnaise in a mixing bowl. Add the ketchup, dill pickles, yellow mustard, white vinegar, paprika, garlic powder, and salt.
Stir to combine.
If you want to thin the sauce, use pickle juice a teaspoon at a time. Refrigerate until ready to serve.

Notes

Store in an airtight container in the refrigerator for up to five days. Stir before serving.

Makes approximately 12 tablespoons.

Nutrition