Add your chicken breast to a small pot, cover with just enough water to submerge the chicken, and sprinkle on salt, chili powder, and black pepper.
Boil on high with lid off, flipping the chicken once in the middle. Boil until water dries up and chars the bottom (put on lid while charring) then take off the stove with the lid still on so the chicken can sit in the smoke for a few minutes.
Take out the chicken and let rest on cutting board
Once cool, chop the chicken into small cubes.
Wash the cilantro well then pat dry with paper towel. Mince leaves and stems finely.
Add chicken, cilantro, mayonnaise, and butter into a bowl, and mix well. Taste and season with some sugar (optional) or more salt and pepper if needed.
Let rest in the refrigerator for at least 30 minutes or overnight for best flavor. Make into sandwiches or serve as a spread when ready. Enjoy!