Cut the chicken breast(s) into 1" cubes. Wash and cut the stems off of the cilantro. The stems are used in the soup and the leaves can be added to the soup as a garnish. Cut the jalapeno in half and remove the seeds if you don't like the added spiciness of the seeds. Reserve the other half for garnish if you like.
Add the chicken stock, spices, half of the jalapeno pepper, ¼ of the onion, and about 1 cup of cilantro stems/leaves. I use primarily the stems since it will be blended and it's a good way to use up the entire bunch of cilantro. You can use all leaves if you prefer. Gently press the chicken down below the liquid. Select the manual cook mode on high. Cook for 15 minutes.
Pour the contents of the blender into a strainer and collect the broth in a bowl beneath it. Remove the cilantro, jalapeno, and onion and put it back into the broth. Pour the broth back into the blender. Set the chicken aside.
Add 1 cup enchilada sauce and masa harina. Pulse until the masa is incorporated, scrape down the sides as needed. Cook on manual high for 10 minutes.
Cancel the cook and select the extract function to blend everything up.
Add the chicken back into the blender and let it sit for a few minutes OR place your chicken chunks in your bowl and pour the hot soup over the chicken. Garnish with cilantro, cheese, or any other toppings you like. Enjoy!