Add all the ingredients to the slow cooker except for the yogurt. Cook on low for 6 hours or high for 4 hours. Remove the chicken and shred it. Then return the chicken, plus the Greek yogurt, to the slow cooker. Mix together and cook for another 10 minutes. Serve!: The moment you place the prepared chicken , measured salsa verde , diced jalapeno , chili powder , kosher salt , and black pepper into the slow cooker you will notice an immediate, fresh aroma from the herbs and pepper. The air will carry a promise of the tangy, verdant notes that develop over time. Layering flavors at this stage is important because the long, gentle heat allows the chicken to absorb the salsa verde completely, creating a unified taste. A common trap is crowding the cooker with too many ingredients or adding the Greek yogurt too early, which can prevent the sauce from reducing properly; save the yogurt until after shredding.
Cook on low for 6 hours or high for 4 hours: As the cooker warms, you will hear a steady, soft hum and eventually the aroma will intensify, signaling that the proteins are breaking down and melding with the salsa. The low setting yields the most tender, silky texture because collagen and fibers relax slowly, while high will get you there faster with slightly firmer shreds. This controlled heat is why slow cooking produces such succulent chicken . Avoid opening the lid frequently, since it releases heat and prolongs cooking time, which can affect consistency.
Remove the chicken and shred it: When you lift the chicken out, it should pull apart easily with two forks, and you will see juices that are green and fragrant from the salsa. Shredding releases those juices and mixes them into the meat, creating a juicy texture that is key to the dish. Work on a cutting board and shred in the direction of the grain for the best mouthfeel. If the meat resists shredding, return it to the cooker for another 15 to 30 minutes instead of forcing it, which can make it stringy.
Then return the chicken, plus the Greek yogurt, to the slow cooker: Adding the warmed shredded chicken back into the cooker lets the meat soak in the remaining sauce. Incorporating the cool Greek yogurt at this point transforms the texture, giving the sauce a creamy body without overpowering the green brightness. You will notice a shift from a thin, brothy mix to a thicker, silkier coating on the chicken . Be cautious about adding the yogurt straight from the fridge into very high heat; temper it slightly if you want to avoid any textural change.
Mix together and cook for another 10 minutes: During these final minutes, the flavors finish marrying while the sauce smooths out and warms through. The steam will carry a mellow, tangy aroma as the sauce becomes glossy on the shredded chicken . This short resting cook time ensures the yogurt integrates without curdling, and the result should look cohesive, with a velvety sheen. A frequent mistake is leaving it too long on high after adding dairy, which risks separation, so stick close to the ten minutes.
Serve: When you serve, the scent should be bright and inviting, with the creamy sauce clinging to each shred of chicken . Spoon generous portions onto plates or into tortillas, and expect a pleasing contrast between the tangy salsa and the cool yogurt notes. If the dish seems thin, give it a minute off heat to settle; if it is too thick, a splash of reserved salsa verde can loosen the sauce without diluting flavor. Resist over-salting at this point, because reductions can concentrate saltiness further.