Why leave your house when you can eat at home and homemade? It’s Absurdly simple to make this homemade version of Subway Sweet Onion Sauce. You’ll be perplexed as to why you didn’t begin preparing this flavorful sauce sooner. Excellent for enhancing your preferred handmade subs, sandwiches, chicken, salads, and more!
Don’t be intimidated by the lengthy ingredient list for this Subway menu item; making this sweet onion sauce only takes a few minutes and yields a condiment that practically never goes bad. It could not be simpler to make and makes a terrific addition to anyone’s sandwiches. It doesn’t contain any odd preservatives, which is just a plus.
As much as I enjoy dining out, I equally enjoy staying in and preparing my versions of well-known restaurant favorites. This simple recipe for a substitute for Subway’s sweet onion sauce is perfect for stashing in your refrigerator as a topping for homemade subs.
The Sweet Onion Sauce’s distinctive tang and sweetness define the Subway experience. So it only makes sense that I would try to recreate that distinctive flavor when preparing my own subs!
I’m sure you feel the same way if you enjoy this tangy sauce!
What Is Subway Sweet Onion Sauce?
Have you recently seen the sweet onion sauce on the Subway menu? Are you unsure what it is and what to expect if you get it in a Subway sandwich? So here’s everything you need to know.
What is sweet onion sauce from Subway? The low in fat, sweet, and tasty sweet onion sauce from Subway is prepared with onions and other seasonings. It is one of the restaurant’s distinctive sauces intended to be put on most of its sandwiches or used as a salad dressing.
Frankly, the title contains the key. Regardless, this sauce is quite well-liked. Although it might not be as adaptable as some of the other sauces on the menu, it is still worth a try.
But what exactly is in this sauce, how healthy is it, and what does it taste like? Let’s investigate!
Subway Sweet Onion Sauce (Copycat Recipe)
You can easily whip up your favorite Subway-style sweet onion sauce at home! It’s the perfect balance of sweet, tangy, and savory, with a punch of onion flavor—just right for sandwiches, salads, or even as a dipping sauce.
Ingredients
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1 cup granulated sugar
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½ cup water (add a splash more if needed)
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6 Tbsp white vinegar
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4 tsp red wine vinegar
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1 tsp fresh onion, finely grated
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1 Tbsp Dijon mustard
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⅓ tsp sesame oil
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1 Tbsp cornstarch
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1 Tbsp dried minced onion flakes
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2 tsp dry mustard powder
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1 tsp salt
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1 tsp poppy seeds
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½ tsp celery seed
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⅓ tsp onion powder
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⅓ tsp paprika
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⅓ tsp ground black pepper
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¼ tsp garlic powder
Instructions
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Combine Ingredients:
In a small saucepan, whisk together all the ingredients until smooth. (Tip: If you like, dissolve the cornstarch in a tablespoon of the water first for extra-smooth sauce.) -
Cook the Sauce:
Place the pan over medium-high heat. Whisk frequently as the mixture comes to a gentle boil. -
Simmer and Thicken:
Lower the heat and let the sauce simmer, whisking often, until slightly thickened and glossy, about 4–6 minutes. If the sauce seems too thick, add a splash of water and stir to loosen. -
Cool and Store:
Remove from heat and let the sauce cool to room temperature. Pour into a clean jar or bottle with a tight-fitting lid. -
Chill:
Refrigerate for at least a few hours before using (overnight is best for flavor). Use within 1 month, or freeze for longer storage.
Tips:
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Sauce will thicken more as it cools.
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Shake or stir well before each use.
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Tastes just like Subway’s and is great on subs, wraps, grilled veggies, or as a dipping sauce!
Please share the image below to your Pinterest board if you like this Subway Sweet Onion Sauce Copycat recipe!
You might also like this Popeyes Blackened Ranch Sauce Copycat Recipe!
Subway Sweet Onion Sauce Taste
The flavor of Subway’s sweet onion sauce is as implied by its name. It is highly sweet and leaves a mildly acidic taste in the mouth. It has a lot of flavors and is rather rich; therefore, a little makes a big difference. As a result, it goes exceptionally well with subs made of chicken, turkey, or fish meats, like this blackened tuna steak.
Together with the honey mustard sauce appears to be another dish that Subway consumers enjoy putting together. You won’t want to include it in your steak and cheese, meatball marinara, or pizza sub melt.
But aside from that, it does appear to complement the other menu items really nicely.
Additionally, its combination with chicken and lean meats, in general, is demonstrated by the sweet onion Teriyaki chicken!
Can you Purchase Subway Sweet Onion Sauce?
Unfortunately, it is not possible to purchase Subway Sweet Onion sauce. It can only be ordered in-store and added right to your salad or sandwich. While some shops sell sauces, it’s uncommon to find sweet onion.
In reality, some Subway locations offer a ” Subway Grocery service.” Essentially, this enables clients to purchase specific sauces in a sauce bag. Though, only the mustard, mayonnaise, marinara, ranch sauce, teriyaki, or chipotle sauce are usually available.
You can always specifically request more sweet onion sauce, but the staff’s decision in doing so is final.
However, another sauce brand is sold online and has a flavor profile similar to that of Subway.
You might also like this Arby’s Bronco Berry Sauce Copycat Easy Recipe!
How to Store Subway Sweet Onion Sauce
Allow cooling entirely before transferring, labeling, and placing in an airtight container. Use within one month of storing in the refrigerator; otherwise, freeze for longer storage.
You can store it in a squeeze bottle with an airtight cap if you want.
Subway Sweet Onion Sauce Substitutions
Keto, Sugar-Free, and Diabetic Friendly: Use a low-carb sweetener that measures cup for cup like sugar in place of the sugar. Stevia, Lakanto or Swerve are my top picks.
Verify the individual ingredients (such as sesame oil, red wine vinegar, and Dijon mustard) are free of gluten and other impurities. In all other respects, the recipe, as described, is gluten-free.
Dairy-Free: The recipe, as written, contains no dairy products.
FAQs
Is Subway Sweet Onion Sauce Keto-Friendly?
Whereas Subway’s original version of sweet onion sauce is prepared with a lot of sugar, you may have a delicious version of sweet onion sauce as part of your keto diet if you make it at home with sweetness. You can use Stevia, Swerve, or other keto-friendly sweeteners instead of sugar.
For how long will sweet onion sauce last?
Depending on the components, homemade sauces may last anywhere from a few days to a few months. The best sauce will have a vinegar and spice foundation (like this Subway sweet onion sauce) and keep for two to a month. A sauce made with mayo or eggs might only keep for a few days.
