Pour 2 tablespoons of dry mustard powder into a small mixing bowl.

Sprinkle 1/4 teaspoon of salt over the mustard powder.

Slowly add 1 tablespoon of water to the bowl, stirring gently to combine.

Whisk the mixture vigorously for about 1 minute until smooth and paste-like.

Taste the mustard and adjust thickness by adding more water or mustard powder as desired.

Let the mustard rest at room temperature for 1 minute to develop heat.

Transfer the finished mustard to a small jar with a tight-fitting lid.

Serve immediately or refrigerate before serving with dumplings or roasted meats.