Combine in a blender and make it smooth. About 10 minutes.
3 cloves garlic
2–3 chipotle peppers, from a can packed in adobo sauce
1/2 cup orange juice
1 tablespoon apple cider vinegar
2 tablespoons brown sugar (or honey, or agave)
1 tablespoon achiote paste (see Recipe Notes)
1 tablespoon ancho chili powder
1 teaspoon ground cumin
1 teaspoon dried oregano
kosher salt and ground black pepper, to season