Sweet Heat Onion Mustard Sauce

hot dog with a sweet onion mustard sauce on a bun

5 from 1 vote

Sweet Heat Onion Mustard Sauce

This sauce lives at the intersection of a classic yellow mustard and something a lot more interesting. Buttered onions cooked low and slow bring natural sweetness, brown sugar rounds it out, and cayenne with crushed red pepper gives it just enough kick to keep things spicy. It comes together in one pan, and it pairs perfectly with grilled hot dogs, sausages, or brats.

Prep Time5

Cook Time15

Total Time20

Course: condiment, Sauce

Cuisine: American

Keyword: homemade mustard sauce, mustard sauce for hot dogs, sweet heat mustard, sweet onion mustard sauce

Servings: servings

Calories: 27kcal

Author: Neal Williams

Ingredients

2 tablespoons butter
½ medium yellow onion finely diced
½ cup yellow mustard
¼ cup dijon mustard
1 tablespoon white vinegar
2-3 tablespoons brown sugar
½-¾ teaspoon cayenne pepper
½ teaspoon smoked paprika
¼ teaspoon turmeric
¼ teaspoon crushed red pepper

Instructions

Add the butter and diced onion to a small skillet or saucepan over low heat.
Cook on low heat, stirring occasionally, for the onion to soften and become translucent, about 8–10 minutes. Keep the heat low so the onion softens instead of browning or caramelizing.
Add the yellow mustard, dijon mustard, brown sugar, cayenne, smoked paprika, vinegar, turmeric, and crushed red pepper to the pan with the buttered onions.
Stir everything together and let it cook on low for 5–7 minutes, stirring occasionally, until the sauce is heated through and slightly thickened.
Remove from heat and let cool slightly before serving. Store leftovers in an airtight container in the fridge for up to two weeks.

Nutrition