Cajun Dipping Sauce for Sweet Potato Fries

Name: Cajun Dipping Sauce for Sweet Potato Fries
Prep time: 5 min
Total time: 5 min
Ingredients: ¼ cup mayonnaise; 1 tablespoon ketchup; 1 teaspoon molasses; 1½ teaspoon Cajun seasoning

Last updatedMarch 8, 2025

31 Comments

Home » Recipes

jump to recipe

Sneak Preview: This creamy Cajun sauce is the ultimate dip for sweet potato fries! Made with mayonnaise, ketchup, Cajun seasoning, and a touch of molasses, it’s a quick and flavorful way to spice things up.

cajun dip shown with sweet potato fries and other ingredients

As an Amazon Associate, I earn from qualifying purchases.

Do You Love a Good Dipping Sauce?
If you’re anything like us, condiments are a must. My daughter-in-law once called us the “condiment family,” and honestly, she’s not wrong! We’ve got a favorite sauce for just about everything—except sweet potato fries. Until now.

After trying everything from ranch to honey to spicy ketchup, nothing quite hit the mark. Then I stumbled on this Cajun sauce in a magazine, and let me tell you, it was a game-changer!

Cajun seasoning brings the heat, molasses adds a little sweetness, and the creamy base ties it all together. If you love dipping, this one’s for you!

Happy Cooks Speak Up

“This recipe is great! And so easy too. I am eating it with yam fries (and veggies) right now. Word of caution though: don’t over-measure the molasses, too much throws the taste off a bit.” — BRETT

Ingredients and Substitutions

MAYONNAISE:
- Use good-quality mayo.
- Olive oil mayo works well for a lighter taste.
- Make your own mayo.
KETCHUP:
- Adds a touch of sweetness and acidity.
- Spicy ketchup? Even better.
CAJUN OR CREOLE SEASONING:
- We love Tony Chachere’s, but any brand will work.
MOLASSES:
- Adds depth and sweetness.
- Honey or brown sugar are alternatives, but maple syrup will make the dip runnier.

What Can I Serve This Cajun Sauce With?

Sweet potato chips or fries (of course!)
French fries
Fresh veggies
Squash patties
Fried shrimp
Any fried fish
Jalapeño hushpuppies

How Long Does Cajun Sauce Last?

When made with commercial mayonnaise, this dip will stay fresh for 5-7 days in the fridge.

Need help troubleshooting? Email me: Paula at saladinajar.com—photos welcome!

Join our community of adventurous cooks, and start creating homemade food worth sharing.

If you want inspiration and exclusive tips, add your email and press the button. (Don't worry. I won't sell your email.)

My Amazon Store

Paula Rhodes, owner

As a retired home economist, I created Saladinajar.com to share my belief that you don’t have to be a chef to find joy in creating homemade food worth sharing. Bread machines (used in an unconventional way), homemade yogurt, and quick microwave recipes are my specialty.

4.25 from 8 votes (8 ratings without comment)

31 Comments

Cassandra says:

at

I like honey dill dip or chipotle mayo with my sweet potatoes 🙂

Reply
1. Paula says:
  
  at
  
  Both sound fantastic Cassandra.
  
  Reply
janet says:

at

We enjoy Orange Marmalade with out sweet potato fries, slightly warmed to thin. Yummy!

Reply
Andy V says:

at

Hi- Just found your blog and am lovin’ it!!

My favorite condiment for sweet potatoes is a a greek yogurt dip sole by costco. I think it’s just called “Jalepenjo Dip”. It’s super creamy becuse of the greek yogurt with few calories, tons of taste, and the protein we need (we aren’t big meat eaters). We put it on everything, burritos, wraps, turkey burgers, ect. Hope you can find it at your costco!

Reply
1. Paula says:
  
  at
  
  Andy,
  Love, love Costco. Adding Jalapeno Dip to the list for my next visit. Thanks for the tip.
  
  Reply
April says:

at

I love sweet potato fries with BBQ sauce! {It’s another great mix of sweet and spicy.} Depending upon the particular sauce I’m using, I will sometimes mix a bit of ketchup in as well… but with so many different types of BBQ sauce, there are quite a few flavor combinations to enjoy!

Reply
1. Paula says:
  
  at
  
  Hi April,
  What an easy idea for a dip! Gotta give it a try. Thanks for writing.
  
  Reply
Donna G. says:

at

This sounds great. Thanks.

Reply
Jen says:

at

Hi, I stumbled onto your post and need to share our favorite dips for sweet potato fries as no one had mentioned them. I love them dipped in honey mustard and my daughter mixes ketchup and ranch dressing together for her own “secret” sauce (not so secret now, oops!). I am definitely going to try your recipe next!

Reply
1. Paula says:
  
  at
  
  Jen,
  I have never mixed ketchup and Ranch but I often mix ketchup and mayo or tartar sauce. I can imagine it is quite tasty. Thanks for writing.
  
  Reply
Kimberly says:

at

I love these and found a great dip plus something a little bit sweet….I toss them in Coconut oil before placing in oven. When done I drizzle a bit of organic honey over them and lightly sea salt them. Dip is home made mayo with olive oil, sweet chili sauce, and a dash of pepper. So Good♥

Reply
1. Paula says:
  
  at
  
  Kimberly, Your method sounds fabulous. The dip sounds easy and good too. I’ll let you know when I try it. pr
  
  Reply
Amanda says:

at

Fry sauce is generally ketchup mustard and mayo with occasional spices here and there. You might look up a recipe online then tweek it to your preferences.

Reply
Mandi says:

at

Push comes to shove, I bet you could find it on Amazon.com or the like. It can be addictive, watch out!

Reply
Mandi says:

at

Sounds a lot like Fry Sauce, a tasty dip we eat often in Wyoming/Utah. Best store bought kind is Some Dude’s Fry Sauce, but I’m sure you can find great recipes online. It is the only thing we have found that matches great with sweet potato fries, though I have been known to dip them in thinned cranberry sauce with a little pumpkin pie spice added, and sometimes celery and green apple to make a scoopable dip.

Reply
1. Paula says:
  
  at
  
  Mandi,
  I’ve never heard of Fry Sauce but I’m going to look for it. Wonder if they sell it in Texas. paula
  
  Reply
Ginger says:

at

I ordered sweet potato fries out one day and they were served with apple butter to dip them in.

Reply
1. Paula says:
  
  at
  
  Can’t wait to try this. Thanks Ginger. pr
  
  Reply
Jina says:

at

Found your through pinterest. I’m making your baked spaghetti with cream cheese for dinner tomorrow night, it just looks so good! So excited when I saw this recipe- I have a bag of Costco sweet potato fries in the freezer right now so I can’t wait to try this. I usually eat mine dipped in a balsamic vinegar reduction, I like the tangy with the sweet.
Looking forward to trying many more of your recipes! Thanks!

Reply
Molly says:

at

Another great one is a 1:2 mix of sour cream and mayo, with a sprinkle of paprika, s&p, and fresh chopped cilantro. YUM.

Reply
Brett says:

at

That recipe is great! And so easy too. I am eating it with yam fries (and veggies) right now. Word of caution though: don’t over-measure the molasses, too much throws the taste off a bit.

Reply
1. Paula says:
  
  at
  
  Haven’t tried this dip with other veggies but I can imagine it’s very tasty. Thanks for the word about the molasses. That stuff is strong.
  
  Reply
John says:

at

You know a great dip for sweet potatoes? Horseradish Mayo! It’s so good. All it is, is really horseradish, mayo (adjust to preference of tang and heat), salt, and maybe a tiny squeeze of lemon. So good!

Reply
1. Paula says:
  
  at
  
  This sounded so good, we tried it tonight for dinner with sweet potato fries from Costco. You are right! Delicious. Love it. Thanks so much for leaving a comment!
  
  Reply
Eva says:

at

hmmm maybe i will try this this weekend. I hadn’t really thought about it but i don’t really love the dips i’ve had for sweet potato fries. I’d usually end up just eating them straight. come to think of it I haven’t had sweet potato fries in ages.

Reply
Katrina says:

at

Yum in every way!

Reply
Susie says:

at

thanks for coming up with a condiment for sweet potato fries! yum, yum!

Reply
Karen says:

at

I’ll have to look for the sweet potato fries at Costco. Can’t believe I missed them, we love sweet potatoes at our house:) I’m printing out the dip recipe as I type.

Reply
Mimi says:

at

Sounds perfect for sweet potato fries. I use Trader Joe’s or homemade, I ‘ll have to try the Costco ones.
Mimi

Reply
Margot says:

at

I love sweet potato fries. My boyfriend doesn’t like them as much as I do, but he loves Cajun flavors, so this would be the perfect way to serve them.

Reply
mike says:

at

Such an easy dip (I’m avoiding the condiment word). I’ve made sweet potato fries before (baked) and loved them… reminds me to get that recipe out again! Perfect flavor to pair with the potatoes – and molasses (that must be the secret ingredient)!

Reply