While annatto may seem like an unusual ingredient, only found in the pantries of the most skilled chefs, it’s likely in your refrigerator right now. Yellow and orange cheese, such as cheddar and colby, owe their coloring to the bright orange dye of the annatto seed. In larger amounts, it has a slightly sweet, peppery (sometimes described as musky) flavor. Ground annatto or annatto seeds can be found at most well-stocked grocery stores, and it’s sometimes used interchangeably with achiote, a similarly hued spice.