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A jar of sweet onion sauce with 3 onions and parsley in the background

Subway's Sweet Onion Sauce

A perfect recreation of Subway's sweet onion sauce
4.74 from 261 votes
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Course: Side Dish
Cuisine: American
Cook Time: 10 minutes
Resting Time: 6 hours
Total Time: 6 hours 10 minutes
Servings: 16
Calories: 42kcal
Author: Lauren

Ingredients

  • ⅔ cup sugar granulated
  • ½ cup cold water
  • 6 tablespoon vinegar white or distilled
  • 1 ½ tablespoon red wine vinegar
  • 1 tablespoon cornstarch or arrowroot powder
  • 1 tablespoon minced onion flakes
  • 2 ½ teaspoon dijon mustard
  • 2 ½ tsp mustard powder
  • ¾ teaspoon celery salt
  • ¾ teaspoon fresh onion juice use a garlic press to juice
  • 1 teaspoon poppyseeds
  • ½ teaspoon onion powder
  • ¼ teaspoon garlic powder
  • ½ teaspoon salt
  • ⅓ teaspoon paprika
  • ¼ teaspoon black pepper
  • 1 - 2 drops sesame oil

Instructions

  • In a small pot, whisk together all ingredients over medium high heat - allow to bring to a boil while whisking constantly.
  • Reduce heat to low and simmer, stirring until thickened - around 5 minutes.
  • Allow to cool in the refrigerator overnight.
  • This sauce keeps indefinitely if stored in a sealed jar in the fridge.

Nutrition

Calories: 42kcal | Carbohydrates: 9g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Sodium: 191mg | Potassium: 7mg | Fiber: 1g | Sugar: 8g | Vitamin A: 24IU | Vitamin C: 1mg | Calcium: 4mg | Iron: 1mg
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