The deep red color of Rogan Josh is traditionally achieved using a combination of Kashmiri chili powder and ratan jot (alkanet root), although some modern recipes may rely solely on Kashmiri chili powder for convenience.
Rogan Josh's signature red hue comes from two primary sources: Kashmiri chili powder and ratan jot (alkanet root). Kashmiri chili powder is known for its vibrant color and mild heat, contributing significantly to the dish's appearance. However, the traditional method also incorporates ratan jot, a natural coloring agent that imparts a deeper, more complex red. Ratan jot is typically infused in oil, which then becomes the base for the Rogan Josh, lending both color and a subtle earthy flavor. While some contemporary recipes might omit ratan jot and rely solely on a generous amount of high-quality Kashmiri chili powder to achieve a similar color, the authentic flavor profile is best achieved with both ingredients. The specific ratio and preparation methods can vary depending on regional preferences and family recipes.
If you can't find ratan jot, you can substitute it with a small amount of beetroot powder for color, but be mindful of the flavor impact. Start with a very small amount and adjust to taste, as beetroot can add a slightly sweet note.