Sweet Onion Sauce {Subway Copycat Recipe}
Make this favorite Subway-inspired sauce in the comfort of your own home! Sweet onion sauce has a strong onion flavor, balanced with sweetness, and just a touch of sour.
Ingredients
- 1 cup granulated sugar
- ½ cup + 1 tablespoon water
- 6 tablespoons white vinegar
- 4 ½ teaspoons red wine vinegar
- 1 teaspoon finely grated onion using a small holed grater or garlic press
- 1 tablespoon dijon mustard
- ¼ tsp. Sesame oil
- 1 tablespoon cornstarch
- 1 tablespoon dried minced onion
- 2 tsp. Dry mustard powder
- 1 tsp. salt
- ¾ tsp. Poppy seeds
- ½ tsp. Celery seed
- ¼ tsp. Onion powder
- ¼ tsp. Paprika heaping
- ¼ tsp. Ground black pepper heaping
- ⅛ teaspoon garlic powder heaping
Instructions
- Whisk all of the ingredients together in a small saucepan.
- Bring to a boil over medium-high heat, whisking often to prevent burning.
- Reduce the heat to low and simmer until thickened, about 5 minutes. Ensure to whisk frequently.
- Allow to cool completely, then transfer to an airtight container and label.
- Store in the refrigerator and use within 4 weeks, or freeze for longer storage.
Video
Notes
Grated Onion:
Use a rasp grater to grate the onion. Alternatively, you can use a garlic press to press the onion.
For Low Carb/Keto/Diabetic:
Use 1 cup of sweetener that measures cup for cup with sugar instead of the white granulated sugar in this recipe.
Storage:
If you purchase a squeeze bottle for your sweet onion sauce, be sure to purchase one for a large enough opening for the larger pieces of dried minced onion to get through. You can also cut off a portion of the tip to make the opening larger.
Keep your sweet onion sauce in the fridge in an airtight container for up to 4 weeks.
Adapted from this recipe from Food.com.
Nutrition
Serving: 1g | Calories: 89kcal | Carbohydrates: 21g | Sodium: 274mg | Sugar: 20g