Add water to a pot and boil over medium heat until it comes to a gentle boil. I avoid letting it boil rapidly because it can dry out the chicken.
Lower the heat, add salt and pepper, stir, and add chicken breasts or thighs. Cook on medium heat for about 15 minutes (depending on size). I check that the internal temperature reaches 165°F (74°C).
2 chicken breasts, salt to taste, ½ teaspoon pepper
Remove the chicken to a plate with tongs and let it rest for 5 minutes. Do not skip this step or it will make the chicken dry.
How to shred chicken
Fork method: Use two forks and pull the chicken apart. This works well for small batches.
Stand mixer method: Add warm chicken to a bowl. Use the paddle attachment and mix on low speed for a few seconds. This is very fast when you make meal prep in bulk.
Video
Notes
Don't overcook: Cook just until done to keep chicken juicy.
Rest before shredding: Let juices settle for moist chicken.
Season later: Keeps chicken versatile for different recipes.
Thighs vs. breasts: Thighs are juicier, breasts are leaner.