I start by placing the raw chicken breasts right at the bottom of the crock pot. A light sprinkle of salt and pepper goes on next, just enough to season the meat before everything else joins in. This step takes seconds but sets the flavor foundation for the whole pot.
Next, I scatter the diced onion and minced garlic over the chicken. These two ingredients are what give the broth its savory depth as it slowly simmers. I don't bother sautéing them first; the slow cooker mellows and softens them naturally over the hours ahead.
Now I pour in the chicken broth, water, corn, diced tomatoes and green chiles, and enchilada sauce. I like to add these in one go so I'm not fussing with the lid multiple times. This is where the soup really starts coming together.
I sprinkle the taco seasoning and chili powder over the top, then give everything a good stir so the spices distribute evenly. It only takes a minute, but it makes sure every spoonful tastes balanced instead of clumpy with seasoning in one spot.
I put the lid on and set my crock pot to low for about 8-10 hours. This slow, gentle cooking is what turns plain chicken breasts into shreddable, juicy meat while melding all those spices into the broth.
About 15 minutes before I plan to serve, I pull the chicken breasts out onto a cutting board and shred them with two forks. It practically falls apart on its own at this point, which always feels satisfying after a long day.
I place the shredded chicken back into the pot and stir it in, then let everything cook together for another 15 minutes. This final step lets the shredded chicken soak up even more of that flavorful broth before serving.