Subway Sweet Onion Sauce Recipe (Copycat)

Subway Sweet Onion Sauce Recipe (Copycat)

How To Make Subway Sweet Onion Sauce (Copycat)

Level up your sandwiches with this Subway sweet onion sauce, made with sugar, vinegar, spices, and onion juice for a fiesta flavors.

Preparation: 5 minutes
Cooking: 13 minutes
Total: 18 minutes



  • 1cupgranulated sugar,plus additional 2 tbsp
  • ½cupcold water,plus additional 1 tbsp
  • 6tbspwhite vinegar
  • tbspred wine vinegar
  • 1tbsparrowroot
  • 1tbsponion flakes,minced
  • tspdijon mustard
  • tspmustard powder
  • ¾tspcelery salt
  • ¾tspfresh onion juice
  • ¾tsppoppy seed
  • ½tsponion salt
  • ¼tspgarlic salt,plus additional ⅛ tsp
  • ¼tsppaprika,plus additional ⅛ tsp
  • ¼tspblack pepper,plus additional ⅛ tsp
  • 2dropssesame oil


  1. Whisk sauce ingredients together in a small saucepan.

  2. Bring mixture to boiling while whisking constantly. Reduce heat to low simmer, stirring, for about 5 minutes until thickened and flavorful.

  3. Allow to cool, then refrigerate in a sealed container.

  4. Serve as a dressing for sandwiches or salads and enjoy!


  • Calories: 858.60kcal
  • Fat: 3.43g
  • Saturated Fat: 0.31g
  • Trans Fat: 0.00g
  • Monounsaturated Fat: 1.60g
  • Polyunsaturated Fat: 1.33g
  • Carbohydrates: 207.03g
  • Fiber: 2.41g
  • Sugar: 200.79g
  • Protein: 3.01g
  • Sodium: 1100.33mg
  • Calcium: 83.89mg
  • Potassium: 177.68mg
  • Iron: 1.93mg
  • Vitamin A: 16.64µg
  • Vitamin C: 1.74mg
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