Are brown and black mustard seeds different?
Depending on who you ask, including very knowledgeable spice sellers, brown and black mustard seeds are the same. Sandeep of Pure Indian Foods is among those who say they are the same, while other sources claim they are different. Despite minute differences in size and flavor, they’re easily interchangeable in recipes, and at Milk Street we reach for brown mustard seeds when either black or brown are called for.