
Pork has never been more flavorful than in these Tacos Al Pastor. We'll show you how to make a homemade achiote paste that mixes so well with tart pineapple.
In a small skillet over medium heat, heat oil. Add annatto seeds, coriander, cumin, oregano, peppercorns, mustard seeds, and allspice berries and toast until fragrant, 1 minute. In a food processor or blender, add toasted seeds, garlic, orange juice, vinegar, and salt. Blend until it turns into a mostly smooth paste, scraping down sides as needed.
In a small skillet over medium heat, heat oil. Add chilis and toast until slightly charred and fragrant, 1 minute. In a food processor or blender, add toasted chilis, pineapple juice, achiote paste, vinegar, garlic, brown sugar, salt, cinnamon, and pepper. Blend until fully combined.