If you buy mustard seed there is often yellow and red seeds. Use yellow variety plus turmeric and vinegar for your standard American mustard. Use red and vinega

If you buy mustard seed there is often yellow and red seeds. Use yellow variety plus turmeric and vinegar for your standard American mustard. Use red and vinegar and beer/wine for your brown mustards. In my experience there is little difference in heat, what matters is time to mellow. The older the mustard the less spicy horseradish/wasabi sensation. Perhaps it’s oxidation.