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Subway Sweet Onion Sauce

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This Subway Sweet Onion Sauce is the perfect tangy, sweet, and savory addition to your sandwiches or salads. Made with a mix of onions, mustard, and vinegar, it’s a deliciously flavorful homemade version of the beloved Subway sauce! Ready to elevate your next meal?

Ingredients

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  1. 1 cup sugar – for sweetness
  2. 1/2 cup water – to dissolve the sugar
  3. 6 tablespoons white vinegar – adds tanginess
  4. 1 1/2 tablespoons red wine vinegar – for an extra depth of flavor
  5. 1/2 tablespoon finely minced onion – adds a mild onion taste
  6. 1 tablespoon cornstarch – to thicken the sauce
  7. 2 teaspoons Dijon mustard – for a little tang and spice
  8. 2 teaspoons mustard powder – deepens the mustard flavor
  9. 1 teaspoon poppy seeds – for texture and flavor
  10. 1/2 teaspoon sesame oil – adds a subtle nutty flavor
  11. 1/2 teaspoon onion powder – enhances the onion flavor
  12. 1/2 teaspoon salt – to season
  13. 1/4 teaspoon garlic powder – to round out the flavors
  14. 1/4 teaspoon celery seed – adds complexity
  15. 1/4 teaspoon paprika – for mild heat and color
  16. 1/4 teaspoon black pepper – for a little heat

Instructions

  • Combine Ingredients: Add all the ingredients to a saucepan and whisk thoroughly to combine.
  • Boil the Mixture: Bring the mixture to a boil, whisking constantly to prevent clumping.
  • Simmer the Sauce: Let it boil for 5 minutes, then reduce the heat to a simmer. Continue whisking for an additional 5 minutes.
  • Thicken: Once the sauce thickens, remove it from heat and let it cool completely.
  • Store: Transfer the sauce to an airtight container and store in the refrigerator for up to one week.

Notes

  • This sauce can be stored in the fridge for up to 7 days, so you can make it ahead of time and have it ready for multiple meals!
  • You can adjust the sweetness or tanginess by altering the sugar or vinegar amounts according to your personal taste.
  • This sauce works great not only on sandwiches but also as a dipping sauce for snacks like chicken nuggets or fries.

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