I made my own mustard for the first time today. It was actually about 10 times easier than I imagined it to be. It will keep in the fridge for 2-3 weeks. Make a double batch and share with a friend.
2 Tablespoons powdered mustard
1 Tablespoon turmeric
1/4 teaspoon salt
1 teaspoon sugar
water/mixture water and white vinegar