Preheat oven to 425 degrees Fahrenheit.Pat chicken thighs dry.Combine 2 teaspoons ground cinnamon, half of the mint leaves, basil, and half of the sea salt in a small mixing bowl.
Thoroughly coat each chicken thigh, focusing on the top/skin side of the meat.In a 9x6x2" casserole-style bakeware, mix together the remaining cinnamon, mint, and sea salt with the coconut milk and chicken broth.
Coat the bottom of the dish with this mixture.Line the dish with the chicken thighs skin side up.Bake chicken thighs for 1 hour, basting with the coconut sauce mixture within the pan every 20 minutes.